diff --git a/.gitmodules b/.gitmodules
index 6c974aa8..9b0e9384 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,6 +16,7 @@
 [submodule "test"]
 	path = test
 	url = git@github.com:blockchain-jd-com/jdchain-test.git
-[submodule "kvdb"] 
-	path = kvdb
+[submodule "libs/kvdb"]
+	path = libs/kvdb
 	url = git@github.com:blockchain-jd-com/jdchain-kvdb.git 
+
diff --git a/libs/kvdb b/libs/kvdb
new file mode 160000
index 00000000..7bc93fcd
--- /dev/null
+++ b/libs/kvdb
@@ -0,0 +1 @@
+Subproject commit 7bc93fcd911db8ca0754601b9ecb9ff44e7c7c1e