diff --git a/code_bank.go b/code_bank.go
index 6f2c9a3..f10cf0d 100644
--- a/code_bank.go
+++ b/code_bank.go
@@ -1 +1,49 @@
-package siterpc
\ No newline at end of file
+package siterpc
+
+import (
+	"errors"
+)
+
+/**
+ * 获取code_bank一条可用记录
+ * 2021/09/09
+ * linsen
+ */
+func GetOneCode(site_id, dbname string, url ...string) (string, error) {
+
+	if dbname == "" {
+		return "", errors.New("参数错误")
+	}
+
+	conn, err := rpc_server_conn(url...)
+
+	if err != nil {
+		return "", err
+	}
+	defer conn.Close()
+
+	arg := SiteConfigItemReqArg{site_id, dbname, ""}
+
+	req, err := SetReqData(arg)
+	if err != nil {
+		return "", err
+	}
+	res := &Response{}
+
+	err = conn.GetOneCode(req, res)
+
+	if err != nil {
+		return "", err
+	}
+
+	res_data_de, err := GetResData(res)
+	if err != nil {
+		return "", err
+	}
+
+	if res_data_de == "" {
+		return "", nil
+	}
+
+	return res_data_de, nil
+}
\ No newline at end of file
diff --git a/code_bank_test.go b/code_bank_test.go
new file mode 100644
index 0000000..70c85cd
--- /dev/null
+++ b/code_bank_test.go
@@ -0,0 +1,9 @@
+package siterpc
+
+import "testing"
+
+func Test_getcode(t *testing.T){
+	res,err := GetOneCode("1058278","shop_v2")
+	t.Log(res)
+	t.Log(err)
+}
\ No newline at end of file