diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 832698b8bfaa5e2275cb5202fb42abb9f3afce75..0000000000000000000000000000000000000000
--- a/.gitmodules
+++ /dev/null
@@ -1,4 +0,0 @@
-[submodule "book"]
-	path = book
-	url = https://github.com/PaddlePaddle/book.git
-	branch = develop
\ No newline at end of file