diff --git a/_examples/core/string_test.go b/_examples/core/string_test.go
index c72ee23..34fee11 100644
--- a/_examples/core/string_test.go
+++ b/_examples/core/string_test.go
@@ -11,6 +11,12 @@ func TestLength(t *testing.T) {
 	fmt.Println(strKit.Length("👩‍👩‍👦‍👦"))
 }
 
+func TestIsNum(t *testing.T) {
+	fmt.Println(strKit.IsNum("123"))
+	fmt.Println(strKit.IsNum("123.123"))
+	fmt.Println(strKit.IsNum("123.123.123"))
+}
+
 func TestSplicing(t *testing.T) {
 	fmt.Println(strKit.Splicing("aa", "bb", "cc"))
 }
diff --git a/core/strKit/strKit.go b/core/strKit/strKit.go
index 753b17c..a9bb501 100644
--- a/core/strKit/strKit.go
+++ b/core/strKit/strKit.go
@@ -38,6 +38,16 @@ func Splicing(str ...string) string {
 	return newStr.String()
 }
 
+// IsNum 判断字符串是否为数字
+/*
+ * @param s 字符串
+ * @return 返回是否为数字 true为数字；false为非数字
+ */
+func IsNum(s string) bool {
+	_, err := strconv.ParseFloat(s, 64)
+	return err == nil
+}
+
 // SubString 字符串截断
 /**
  * @param s 原始字符串