diff --git a/util/math/math.go b/util/math/math.go
deleted file mode 100644
index 56399cc..0000000
--- a/util/math/math.go
+++ /dev/null
@@ -1,129 +0,0 @@
-package math
-
-import (
-	"github.com/duanhf2012/origin/v2/log"
-)
-
-type NumberType interface {
-	int | int8 | int16 | int32 | int64 | float32 | float64 | uint | uint8 | uint16 | uint32 | uint64
-}
-
-type SignedNumberType interface {
-	int | int8 | int16 | int32 | int64 | float32 | float64
-}
-
-type FloatType interface {
-	float32 | float64
-}
-
-func Max[NumType NumberType](number1 NumType, number2 NumType) NumType {
-	if number1 > number2 {
-		return number1
-	}
-
-	return number2
-}
-
-func Min[NumType NumberType](number1 NumType, number2 NumType) NumType {
-	if number1 < number2 {
-		return number1
-	}
-
-	return number2
-}
-
-func Abs[NumType SignedNumberType](Num NumType) NumType {
-	if Num < 0 {
-		return -1 * Num
-	}
-
-	return Num
-}
-
-func AddSafe[NumType NumberType](number1 NumType, number2 NumType) (NumType, bool) {
-	ret := number1 + number2
-	if number2 > 0 && ret < number1 {
-		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
-		return ret, false
-	} else if number2 < 0 && ret > number1 {
-		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
-		return ret, false
-	}
-
-	return ret, true
-}
-
-func SubSafe[NumType NumberType](number1 NumType, number2 NumType) (NumType, bool) {
-	ret := number1 - number2
-	if number2 > 0 && ret > number1 {
-		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
-		return ret, false
-	} else if number2 < 0 && ret < number1 {
-		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
-		return ret, false
-	}
-
-	return ret, true
-}
-
-func MulSafe[NumType NumberType](number1 NumType, number2 NumType) (NumType, bool) {
-	ret := number1 * number2
-	if number1 == 0 || number2 == 0 {
-		return ret, true
-	}
-
-	if ret/number2 == number1 {
-		return ret, true
-	}
-
-	log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
-	return ret, true
-}
-
-func Add[NumType NumberType](number1 NumType, number2 NumType) NumType {
-	ret, _ := AddSafe(number1, number2)
-	return ret
-}
-
-func Sub[NumType NumberType](number1 NumType, number2 NumType) NumType {
-	ret, _ := SubSafe(number1, number2)
-	return ret
-}
-
-func Mul[NumType NumberType](number1 NumType, number2 NumType) NumType {
-	ret, _ := MulSafe(number1, number2)
-	return ret
-}
-
-// 安全的求比例
-func PercentRateSafe[NumType NumberType, OutNumType NumberType](maxValue int64, rate NumType, numbers ...NumType) (OutNumType, bool) {
-	// 比例不能为负数
-	if rate < 0 {
-		log.Stack("rate must not positive")
-		return 0, false
-	}
-
-	if rate == 0 {
-		// 比例为0
-		return 0, true
-	}
-
-	ret := int64(rate)
-	for _, number := range numbers {
-		number64 := int64(number)
-		result, success := MulSafe(number64, ret)
-		if !success {
-			// 基数*比例越界了，int64都越界了，没办法了
-			return 0, false
-		}
-
-		ret = result
-	}
-
-	ret = ret / 10000
-	if ret > maxValue {
-		return 0, false
-	}
-
-	return OutNumType(ret), true
-}
diff --git a/util/smath/smath.go b/util/smath/smath.go
new file mode 100644
index 0000000..e7bc71c
--- /dev/null
+++ b/util/smath/smath.go
@@ -0,0 +1,86 @@
+package smath
+
+import (
+	"github.com/duanhf2012/origin/v2/log"
+	"github.com/duanhf2012/origin/v2/util/typedef"
+)
+
+func Max[NumType typedef.Number](number1 NumType, number2 NumType) NumType {
+	if number1 > number2 {
+		return number1
+	}
+
+	return number2
+}
+
+func Min[NumType typedef.Number](number1 NumType, number2 NumType) NumType {
+	if number1 < number2 {
+		return number1
+	}
+
+	return number2
+}
+
+func Abs[NumType typedef.Signed|typedef.Float](Num NumType) NumType {
+	if Num < 0 {
+		return -1 * Num
+	}
+
+	return Num
+}
+
+func AddSafe[NumType typedef.Number](number1 NumType, number2 NumType) (NumType, bool) {
+	ret := number1 + number2
+	if number2 > 0 && ret < number1 {
+		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
+		return ret, false
+	} else if number2 < 0 && ret > number1 {
+		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
+		return ret, false
+	}
+
+	return ret, true
+}
+
+func SubSafe[NumType typedef.Number](number1 NumType, number2 NumType) (NumType, bool) {
+	ret := number1 - number2
+	if number2 > 0 && ret > number1 {
+		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
+		return ret, false
+	} else if number2 < 0 && ret < number1 {
+		log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
+		return ret, false
+	}
+
+	return ret, true
+}
+
+func MulSafe[NumType typedef.Number](number1 NumType, number2 NumType) (NumType, bool) {
+	ret := number1 * number2
+	if number1 == 0 || number2 == 0 {
+		return ret, true
+	}
+
+	if ret/number2 == number1 {
+		return ret, true
+	}
+
+	log.Stack("Calculation overflow", log.Any("number1", number1), log.Any("number2", number2))
+	return ret, true
+}
+
+func Add[NumType typedef.Number](number1 NumType, number2 NumType) NumType {
+	ret, _ := AddSafe(number1, number2)
+	return ret
+}
+
+func Sub[NumType typedef.Number](number1 NumType, number2 NumType) NumType {
+	ret, _ := SubSafe(number1, number2)
+	return ret
+}
+
+func Mul[NumType typedef.Number](number1 NumType, number2 NumType) NumType {
+	ret, _ := MulSafe(number1, number2)
+	return ret
+}
+
diff --git a/util/typedef/type.go b/util/typedef/type.go
index ce11cf5..b3bb086 100644
--- a/util/typedef/type.go
+++ b/util/typedef/type.go
@@ -17,7 +17,7 @@ type Integer interface {
 }
 
 type Number interface {
-	Signed|Unsigned
+	Signed|Unsigned|Float
 }
 
 type Ordered interface {