diff --git a/demo/advanced.yaml b/demo/advanced.yaml
index a1754922087641abc4c9b770c585b10f7ad93d63..27cbc974552b2ae43b97ad816f4621415b23707e 100644
--- a/demo/advanced.yaml
+++ b/demo/advanced.yaml
@@ -24,9 +24,10 @@ fields:
     postfix: "]\t"
 
   - field: field_value                 # 引用同文件其他字段进行数学运算。
-    value: "$field_step_negative * 2 - 1"
+    value: "($field_step_negative * $field_nested_range) * -1 + 1000"
     prefix: "["
     postfix: "]\t"
+    length: 20
 
   - field: field_nested_range
     from: zentao.number.v1.yaml       # 引用用户自定义ranges，存于users目录下。
diff --git a/go.mod b/go.mod
index b2e572883abc14e900b9750f2a06852d4bf3f87e..ef85d676d94ed0aad316fc923ebd0f185a816310 100644
--- a/go.mod
+++ b/go.mod
@@ -7,6 +7,7 @@ require golang.org/x/text v0.3.3
 require (
 	github.com/360EntSecGroup-Skylar/excelize/v2 v2.3.0
 	github.com/Chain-Zhang/pinyin v0.1.3
+	github.com/Knetic/govaluate v3.0.0+incompatible
 	github.com/akavel/rsrc v0.9.0 // indirect
 	github.com/emirpasic/gods v1.12.0
 	github.com/fatih/color v1.9.0
diff --git a/go.sum b/go.sum
index a59e6404c9ab1bfbfb3e907c1d5281c9e866a911..15fbae61b34c14d9a064db31a15e4e363c3c7845 100644
--- a/go.sum
+++ b/go.sum
@@ -5,6 +5,8 @@ github.com/360EntSecGroup-Skylar/excelize/v2 v2.3.0 h1:tDWYNCJrpNnlNg8mVdlzAzPjl
 github.com/360EntSecGroup-Skylar/excelize/v2 v2.3.0/go.mod h1:Uwb0d1GgxJieUWZG5WylTrgQ2SrldfjagAxheU8W6MQ=
 github.com/Chain-Zhang/pinyin v0.1.3 h1:RzErNyNwVa8z2sOLCuXSOtVdY/AsARb8mBzI2p2qtnE=
 github.com/Chain-Zhang/pinyin v0.1.3/go.mod h1:5iHpt9p4znrnaP59/hfPMnAojajkDxQaP9io+tRMPho=
+github.com/Knetic/govaluate v3.0.0+incompatible h1:7o6+MAPhYTCF0+fdvoz1xDedhRb4f6s9Tn1Tt7/WTEg=
+github.com/Knetic/govaluate v3.0.0+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/akavel/rsrc v0.9.0 h1:HwUDC0+tMFWqN4D5G+o5siGD4oVsC3jn6zM8ocjc3nY=
 github.com/akavel/rsrc v0.9.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
diff --git a/src/action/generator.go b/src/action/generator.go
index d0dac31d37348eb0b75fea594ff67feda079ff8f..7e146b075ae2e1a02237cd099ef724293380ce85 100644
--- a/src/action/generator.go
+++ b/src/action/generator.go
@@ -23,7 +23,7 @@ func Generate(defaultFile string, configFile string, fieldsToExportStr, format,
 		fieldsToExport = strings.Split(fieldsToExportStr, ",")
 	}
 
-	rows, colIsNumArr, err := gen.GenerateForOnTop(defaultFile, configFile, &fieldsToExport)
+	rows, colIsNumArr, err := gen.GenerateOnTopLevel(defaultFile, configFile, &fieldsToExport)
 	if err != nil {
 		return
 	}
diff --git a/src/gen/generator.go b/src/gen/generator.go
index 6e8cea69d4fad7dc65d7d22a9cb868797c1bdcf0..e7f87a536185ef9595efd415c0b7f737dc0448eb 100644
--- a/src/gen/generator.go
+++ b/src/gen/generator.go
@@ -2,6 +2,7 @@ package gen
 
 import (
 	"errors"
+	"github.com/easysoft/zendata/src/gen/helper"
 	"github.com/easysoft/zendata/src/model"
 	commonUtils "github.com/easysoft/zendata/src/utils/common"
 	constant "github.com/easysoft/zendata/src/utils/const"
@@ -16,7 +17,7 @@ import (
 	"strings"
 )
 
-func GenerateForOnTop(defaultFile, configFile string, fieldsToExport *[]string,
+func GenerateOnTopLevel(defaultFile, configFile string, fieldsToExport *[]string,
 		) (rows [][]string, colIsNumArr []bool, err error) {
 
 	vari.DefaultDir = fileUtils.GetAbsDir(defaultFile)
@@ -40,7 +41,7 @@ func GenerateForOnTop(defaultFile, configFile string, fieldsToExport *[]string,
 	vari.Res = LoadResDef(*fieldsToExport)
 	vari.ResLoading = false
 
-	topFieldNameToValuesMap := map[string][]string{}
+	topLevelFieldNameToValuesMap := map[string][]string{}
 
 	// 为每个field生成值列表
 	for index, field := range vari.Def.Fields {
@@ -55,7 +56,7 @@ func GenerateForOnTop(defaultFile, configFile string, fieldsToExport *[]string,
 
 		vari.Def.Fields[index].Precision = field.Precision
 
-		topFieldNameToValuesMap[field.Field] = values
+		topLevelFieldNameToValuesMap[field.Field] = values
 		colIsNumArr = append(colIsNumArr, field.IsNumb)
 	}
 
@@ -66,7 +67,11 @@ func GenerateForOnTop(defaultFile, configFile string, fieldsToExport *[]string,
 			continue
 		}
 
-		childValues := topFieldNameToValuesMap[child.Field]
+		childValues := topLevelFieldNameToValuesMap[child.Field]
+		if child.Value != "" { // is value expression
+			childValues = helper.GenExpressionValues(child, topLevelFieldNameToValuesMap)
+		}
+
 		arrOfArr = append(arrOfArr, childValues)
 	}
 	rows = putChildrenToArr(arrOfArr, vari.Recursive)
diff --git a/src/gen/helper/expression.go b/src/gen/helper/expression.go
new file mode 100644
index 0000000000000000000000000000000000000000..4434d5e4a732c28839423fd631cdc548c7832f68
--- /dev/null
+++ b/src/gen/helper/expression.go
@@ -0,0 +1,110 @@
+package helper
+
+import (
+	"fmt"
+	"github.com/Knetic/govaluate"
+	"github.com/easysoft/zendata/src/model"
+	logUtils "github.com/easysoft/zendata/src/utils/log"
+	stringUtils "github.com/easysoft/zendata/src/utils/string"
+	"github.com/easysoft/zendata/src/utils/vari"
+	"github.com/mattn/go-runewidth"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func GenExpressionValues(field model.DefField, valuesMap map[string][]string) (ret []string) {
+	exp := field.Value
+
+	reg := regexp.MustCompile(`\$([_,a-z,A-Z,0-9]+)`)
+	arr := reg.FindAllStringSubmatch(exp,-1)
+
+	total := 1
+	for _, items := range arr { // computer total
+		placeholder := items[0]
+		fieldName := items[1]
+		exp = strings.Replace(exp, placeholder, fieldName, 1)
+
+		size := len(valuesMap[fieldName])
+		if total < size {
+			total = size
+		}
+	}
+
+	dataTypeFromValues := "int"
+	for i := 0; i < total; i++ {
+		params := make(map[string]interface{})
+
+		//expr1, err1 := govaluate.NewEvaluableExpression("1+1")
+		//result, err := expr1.Evaluate(params)
+		//fmt.Sprintf("%v, %v, %v", expr1, err1, result)
+
+		for _, items := range arr {
+			fieldName := items[1]
+			referValues := valuesMap[fieldName]
+			referField := vari.TopFieldMap[fieldName]
+
+			logUtils.PrintErrMsg(referField.Value)
+
+			valStr := "N/A"
+			tp := ""
+			var val interface{}
+			if len(referValues) > 0 {
+				valStr = referValues[i % len(referValues)]
+				valStr = strings.TrimLeft(valStr, field.Prefix)
+				valStr = strings.TrimRight(valStr, field.Postfix)
+
+				val, tp = getNumType(valStr)
+				if tp != "int" {
+					dataTypeFromValues = tp
+				}
+			}
+			params[fieldName] = val
+		}
+
+		expr, err := govaluate.NewEvaluableExpression(exp)
+		if err != nil {
+			logUtils.PrintErrMsg(err.Error())
+			ret = append(ret, "ERR")
+		} else {
+			result, err := expr.Evaluate(params)
+			if err != nil {
+				logUtils.PrintErrMsg(err.Error())
+			}
+
+			mask := ""
+			if dataTypeFromValues == "int"  {
+				mask = "%.0f"
+			} else {
+				mask = "%d"
+			}
+
+			str := fmt.Sprintf(field.Prefix + mask + field.Postfix, result)
+			if field.Length > runewidth.StringWidth(str) {
+				str = stringUtils.AddPad(str, field)
+			}
+			ret = append(ret, str)
+		}
+	}
+
+	return
+}
+
+func getNumType(str string) (val interface{}, tp string) {
+	val, errInt := strconv.ParseInt(str, 0, 64)
+	if errInt == nil {
+		tp = "int"
+		return
+	}
+
+	val, errFloat := strconv.ParseFloat(str, 64)
+	if errFloat == nil {
+		tp = "float"
+		return
+	}
+
+	val = str
+	tp = "float"
+
+	return
+}
\ No newline at end of file
diff --git a/src/gen/list.go b/src/gen/list.go
index 1d9f849ad66f7198f580d6100f134f2f9392a62f..43abd256898a9ddb12831acf393e608570135e74 100644
--- a/src/gen/list.go
+++ b/src/gen/list.go
@@ -257,7 +257,7 @@ func CreateValuesFromYaml(field *model.DefField, yamlFile, stepStr string, repea
 
 	configFile := vari.ConfigDir + yamlFile
 	fieldsToExport := make([]string, 0) // set to empty to use all fields
-	rows, colIsNumArr, _ := GenerateForOnTop("", configFile, &fieldsToExport)
+	rows, colIsNumArr, _ := GenerateOnTopLevel("", configFile, &fieldsToExport)
 	if field.Rand {
 		rows = randomValuesArr(rows)
 	}