diff --git a/go.mod b/go.mod
index 6ffce81..ab84572 100644
--- a/go.mod
+++ b/go.mod
@@ -8,16 +8,18 @@ require (
 	git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20240130062251-a87a97b0e8d4
 	git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20240110090803-399e964daa0c
 	github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394
+	github.com/stretchr/testify v1.8.4
 )
 
 require (
 	git.zhangdeman.cn/zhangdeman/consts v0.0.0-20240104123641-b3f23974e5d6 // indirect
 	git.zhangdeman.cn/zhangdeman/util v0.0.0-20231227095334-7eb5cdbf9253 // indirect
 	github.com/BurntSushi/toml v1.3.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-ini/ini v1.67.0 // indirect
 	github.com/mitchellh/go-homedir v1.1.0 // indirect
 	github.com/mozillazg/go-pinyin v0.20.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 74f2e60..8f4228b 100644
--- a/go.sum
+++ b/go.sum
@@ -1,15 +1,7 @@
-git.zhangdeman.cn/zhangdeman/consts v0.0.0-20230815040024-2b12dd51d19b h1:C7KftnLh7dOqzNRs5dn/9yqMDvuqMn5RCglvV6bY758=
-git.zhangdeman.cn/zhangdeman/consts v0.0.0-20230815040024-2b12dd51d19b/go.mod h1:IXXaZkb7vGzGnGM5RRWrASAuwrVSNxuoe0DmeXx5g6k=
 git.zhangdeman.cn/zhangdeman/consts v0.0.0-20240104123641-b3f23974e5d6 h1:ytpXTP3oxp480BAZQoOzqlBP4XP73NcpMplZ1/fA1lQ=
 git.zhangdeman.cn/zhangdeman/consts v0.0.0-20240104123641-b3f23974e5d6/go.mod h1:IXXaZkb7vGzGnGM5RRWrASAuwrVSNxuoe0DmeXx5g6k=
-git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20231224145141-489e31b07a71 h1:nvVSH+Ju8EmoPiPHTae5lxHo4kDjROYChs19Yayz+NY=
-git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20231224145141-489e31b07a71/go.mod h1:SrtvrQRdzt+8KfYzvosH++gWxo2ShPTzR1m3VQ6uX7U=
-git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20231229032122-804bc9822704 h1:y/hXa0Ez+u0ka+QLv1abiCRy+rlJlnNdaH4H/eI6ZJ0=
-git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20231229032122-804bc9822704/go.mod h1:SrtvrQRdzt+8KfYzvosH++gWxo2ShPTzR1m3VQ6uX7U=
 git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20240130062251-a87a97b0e8d4 h1:93JYY8JLbFcrlq37q/uKyxs2r2e3modsjvfSbnZQ/UI=
 git.zhangdeman.cn/zhangdeman/easymap v0.0.0-20240130062251-a87a97b0e8d4/go.mod h1:SrtvrQRdzt+8KfYzvosH++gWxo2ShPTzR1m3VQ6uX7U=
-git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20231224125439-01f39b6ea08d h1:TV0BCQQewBEtLsv3i9gXkxLFd5A5bWBTiNd3D/I5o4Q=
-git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20231224125439-01f39b6ea08d/go.mod h1:w7kG4zyTJ1uPFaTWhze+OQuaUBINT2XnDxpyiM6ctc0=
 git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20240110090803-399e964daa0c h1:k7VCn9GfRGTilvdF/TcTFVMDBfKLe3VeGAtMTiDSnS0=
 git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20240110090803-399e964daa0c/go.mod h1:w7kG4zyTJ1uPFaTWhze+OQuaUBINT2XnDxpyiM6ctc0=
 git.zhangdeman.cn/zhangdeman/util v0.0.0-20231227095334-7eb5cdbf9253 h1:GO3oZa5a2sqwAzGcLDJtQzmshSWRmoP7IDS8bwFqvC4=
diff --git a/tool/define/diff.go b/tool/define/diff.go
index 6270cc4..5b9d50a 100644
--- a/tool/define/diff.go
+++ b/tool/define/diff.go
@@ -8,8 +8,11 @@
 package define
 
 import (
+	"fmt"
+	"git.zhangdeman.cn/zhangdeman/util"
 	"git.zhangdeman.cn/zhangdeman/wrapper"
 	"reflect"
+	"strings"
 )
 
 // DiffOption 做数据对比时的选项
@@ -18,11 +21,28 @@ import (
 //
 // Date : 11:12 2024/3/8
 type DiffOption struct {
-	StrictMode          bool                      `json:"strict_mode"`         // 采用严格模式: 1 != "1" , 采用非严格模式 1 == "1"
-	IgnoreEmptyString   bool                      `json:"ignore_empty_string"` // 忽略空字符串, 若输入值为空字符串, 则不做比较, 认为两个值相同
-	IgnoreZeroNumber    bool                      `json:"ignore_zero_number"`  // 忽略置为0的数字, 若输入的数据为数字类型, 则不做比较, 认为两个值相同
-	IgnoreNil           bool                      `json:"ignore_nil"`          // 忽略 nil 值, 若输入值为NIL , 则不做比较, 认为两个值相同
-	CustomDiffFuncTable map[string]CustomDiffFunc `json:"-"`                   // 外部自定义的字段是否相同的比较函数, 会优先使用外部输入的比较函数
+	StrictMode          bool                      `json:"strict_mode"`            // 采用严格模式: 1 != "1", 1 != 1.0 , 采用非严格模式 1 == "1", 1 == 1.0
+	IgnoreNotFoundField bool                      `json:"ignore_not_found_field"` // 忽略不存在的字段
+	IgnoreEmptyString   bool                      `json:"ignore_empty_string"`    // 忽略空字符串, 若输入值为空字符串, 则不做比较, 认为两个值相同
+	IgnoreZeroNumber    bool                      `json:"ignore_zero_number"`     // 忽略置为0的数字, 若输入的数据为数字类型, 则不做比较, 认为两个值相同
+	IgnoreNil           bool                      `json:"ignore_nil"`             // 忽略 nil 值, 若输入值为NIL , 则不做比较, 认为两个值相同
+	CustomDiffFuncTable map[string]CustomDiffFunc `json:"-"`                      // 外部自定义的字段是否相同的比较函数, 会优先使用外部输入的比较函数
+}
+
+// NewDiffOption ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 12:06 2024/3/8
+func NewDiffOption() *DiffOption {
+	return &DiffOption{
+		StrictMode:          false,
+		IgnoreNotFoundField: false,
+		IgnoreEmptyString:   false,
+		IgnoreZeroNumber:    false,
+		IgnoreNil:           false,
+		CustomDiffFuncTable: make(map[string]CustomDiffFunc),
+	}
 }
 
 // CustomDiffFunc 自定义字段对比方法
@@ -56,8 +76,10 @@ type DiffResult struct {
 }
 
 const (
-	DiffReasonTypeNotMatch  = "TYPE_NOT_MATCH"  // 类型不匹配
-	DiffReasonValueNotMatch = "VALUE_NOT_MATCH" // 数据值不匹配
+	DiffReasonTypeNotMatch         = "TYPE_NOT_MATCH"          // 类型不匹配
+	DiffReasonValueNotMatch        = "VALUE_NOT_MATCH"         // 数据值不匹配
+	DiffReasonInputFieldNotFound   = "INPUT_FIELD_NOT_FOUND"   // 输入数据中不存在相关字段
+	DiffReasonStorageFieldNotFound = "STORAGE_FIELD_NOT_FOUND" // 存储数据中不存在相关字段
 )
 
 var (
@@ -76,6 +98,7 @@ var (
 		reflect.Uint64:  true,
 		reflect.Float32: true,
 		reflect.Float64: true,
+		reflect.String:  true,
 		// reflect.Ptr:     true,
 	}
 )
@@ -91,3 +114,125 @@ func IsSupportValueType(kind reflect.Kind) bool {
 	}
 	return false
 }
+
+// DefaultDiffFunc 默认的diff函数
+//
+// Author : zhangdeman001@ke.com<张德满>
+//
+// Date : 12:05 2024/3/8
+func DefaultDiffFunc(field string, inputVal wrapper.Map, storageVal wrapper.Map, option *DiffOption) *DiffResult {
+	if nil == option {
+		option = NewDiffOption()
+	}
+	result := &DiffResult{
+		OldVal:     nil,
+		NewVal:     nil,
+		IsSame:     true,
+		DiffReason: "",
+		Err:        nil,
+	}
+	var (
+		inputFieldVal        interface{}
+		inputFieldValExist   bool
+		storageFieldVal      interface{}
+		storageFieldValExist bool
+	)
+
+	inputFieldVal, inputFieldValExist = inputVal.Get(field)
+	storageFieldVal, storageFieldValExist = storageVal.Get(field)
+	// 字段在输入数据和存储数据中均不存在
+	if !inputFieldValExist && !storageFieldValExist {
+		// 输入和存储都没这个字段
+		return result
+	}
+
+	// 判断输入字段是否存在
+	if !inputFieldValExist {
+		if option.IgnoreNotFoundField {
+			// 忽略不存在的字段
+			return result
+		}
+		// 由于前置逻辑保证了, 输入不存在相关字段, 则现存数据一定存在相关字段
+		result.IsSame = false
+		result.DiffReason = DiffReasonInputFieldNotFound
+		result.OldVal = storageFieldVal
+		return result
+	}
+	// 判断存储字段是否存在
+	if !storageFieldValExist {
+		result.IsSame = false
+		result.DiffReason = DiffReasonStorageFieldNotFound
+		result.NewVal = inputFieldVal
+		return result
+	}
+	// 校验类型
+	inputFieldValType := reflect.TypeOf(inputFieldVal)
+	storageFieldValType := reflect.TypeOf(storageFieldVal)
+	if inputFieldValType.Kind() == reflect.Ptr {
+		inputReflect := reflect.ValueOf(inputFieldVal)
+		inputFieldValType = inputReflect.Type()
+		inputFieldVal = inputReflect.Interface()
+	}
+	if storageFieldValType.Kind() == reflect.Ptr {
+		storageReflect := reflect.ValueOf(storageFieldValType)
+		storageFieldValType = storageReflect.Type()
+		storageFieldVal = storageReflect.Interface()
+	}
+	result.NewVal = inputFieldVal
+	result.OldVal = storageFieldVal
+	if inputFieldValType.Kind() != storageFieldValType.Kind() && option.StrictMode {
+		// 严格模式下, 类型不相同
+		result.IsSame = false
+		result.DiffReason = DiffReasonTypeNotMatch
+		return result
+	}
+	// 类型相同, 或者非严格模式下不校验类型
+	if option.StrictMode {
+		// 严格模式
+		if inputFieldVal != storageFieldVal {
+			result.IsSame = false
+			result.DiffReason = DiffReasonValueNotMatch
+			return result
+		}
+		// return result
+	}
+	// 非严格模式
+	// 存储值尝试转 float64
+	inputValStr := fmt.Sprintf("%v", inputFieldVal)
+	storageValStr := fmt.Sprintf("%v", storageFieldVal)
+	var (
+		storageFloat64 float64
+		inputFloat64   float64
+	)
+	if err := util.ConvertAssign(&storageFloat64, storageValStr); nil == err {
+		if err := util.ConvertAssign(&inputFloat64, inputValStr); nil == err {
+			if storageFloat64 == inputFloat64 {
+				return result
+			}
+		}
+	}
+	if inputValStr == storageValStr {
+		return result
+	}
+	// 浮点型数字. 去小数部分最右侧的0
+	if inputFieldValType.Kind() == reflect.Float64 || inputFieldValType.Kind() == reflect.Float32 {
+		inputValStrArr := strings.Split(inputValStr, ".")
+		if len(inputValStrArr) == 2 {
+			inputValStrArr[1] = strings.TrimRight(inputValStrArr[1], "0")
+			inputValStr = strings.Join(inputValStrArr, ".")
+		}
+	}
+	if storageFieldValType.Kind() == reflect.Float64 || storageFieldValType.Kind() == reflect.Float32 {
+		storageValStrArr := strings.Split(storageValStr, ".")
+		if len(storageValStrArr) == 2 {
+			storageValStrArr[1] = strings.TrimRight(storageValStrArr[1], "0")
+			storageValStr = strings.Join(storageValStrArr, ".")
+		}
+	}
+	if inputValStr != storageValStr {
+		result.IsSame = false
+		result.DiffReason = DiffReasonValueNotMatch
+		return result
+	}
+	return result
+}
diff --git a/tool/define/diff_test.go b/tool/define/diff_test.go
new file mode 100644
index 0000000..1f36560
--- /dev/null
+++ b/tool/define/diff_test.go
@@ -0,0 +1,48 @@
+// Package define ...
+//
+// Description : define ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2024-03-08 15:24
+package define
+
+import (
+	"git.zhangdeman.cn/zhangdeman/wrapper"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestDefaultDiffFunc(t *testing.T) {
+	var (
+		num1 float64 = 1.0
+		num2 float32 = 1.00
+		num3 string  = "1"
+		num4 string  = "1.00"
+	)
+	input := wrapper.EasyMap(map[string]interface{}{
+		"num":  num1,
+		"num3": num3,
+		"num4": num4,
+		"num5": num1,
+	})
+	storage := wrapper.EasyMap(map[string]interface{}{
+		"num":  num2,
+		"num3": num2,
+		"num4": num2,
+		"num5": num1,
+	})
+	diffOption := NewDiffOption()
+	diffOption.StrictMode = true
+	res := DefaultDiffFunc("num", input, storage, diffOption)
+	assert.EqualValues(t, false, res.IsSame, "严格模式下, float32与float64不相等")
+	res = DefaultDiffFunc("num5", input, storage, diffOption)
+	assert.EqualValues(t, true, res.IsSame, "严格模式下, float32与float32相等")
+	diffOption.StrictMode = false
+	res = DefaultDiffFunc("num", input, storage, diffOption)
+	assert.EqualValues(t, true, res.IsSame, "非严格模式下, float32与float64相等")
+	res = DefaultDiffFunc("num3", input, storage, diffOption)
+	assert.EqualValues(t, true, res.IsSame, "非严格模式下, float32与string相等")
+	res = DefaultDiffFunc("num4", input, storage, diffOption)
+	assert.EqualValues(t, true, res.IsSame, "非严格模式下, float32与string相等")
+}