diff --git a/.gitignore b/.gitignore
index c14a2974aaef7b5c29477a72eaa3672e229d5a74..e1d8bd12924032d8dd462e300cb3cefb33c8f038 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-go.sum
\ No newline at end of file
+go.sum
+.vscode
\ No newline at end of file
diff --git a/README.md b/README.md
index e897887dd666193d33071cb8642c9fafe1b26e55..f19e58aaa495effbd8c59562d90e6fc9c882e911 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@
 * [AesCbcPkcs5Encrypt](encrypt/aes.go)：AES/CBC/PKCS5模式加密。
 * [AesCbcPkcs5Decrypt](encrypt/aes.go)：AES/CBC/PKCS5模式解密。
 * [SHA1](encrypt/sha.go)：SHA1算法。
+* [MD5](encrypt/md5.go)：MD5算法。
 
 ### 文件系统(filesystem)
 
diff --git a/encrypt/md5.go b/encrypt/md5.go
new file mode 100644
index 0000000000000000000000000000000000000000..1b188fc11d958cf7d68d7cc5cba3946882f21c73
--- /dev/null
+++ b/encrypt/md5.go
@@ -0,0 +1,14 @@
+package encrypt
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+)
+
+// MD5算法
+func MD5(plainText string) string {
+	hash := md5.New()
+	hash.Write([]byte(plainText))
+	hashSign := hash.Sum(nil)
+	return hex.EncodeToString(hashSign)
+}