diff --git a/.gitmodules b/.gitmodules
index 6db58dc..e69de29 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +0,0 @@
-[submodule "utilities/imp_util_ring_queue"]
-	path = utilities/imp_util_ring_queue
-	url = ssh://git@192.168.124.18:222/Utilities/imp_util_ring_queue.git
-[submodule "utilities/imp_types"]
-	path = utilities/imp_types
-	url = ssh://git@192.168.124.18:222/Utilities/imp_types.git
-[submodule "utilities/imp_util_tlv_trans_protocol"]
-	path = utilities/imp_util_tlv_trans_protocol
-	url = ssh://git@192.168.124.18:222/Utilities/imp_util_tlv_trans_protocol.git
diff --git a/utilities/imp_types b/utilities/imp_types
deleted file mode 160000
index 6cf82b2..0000000
--- a/utilities/imp_types
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 6cf82b2d2c8f3c944dd93f079f9cc7f0eef6018c
diff --git a/utilities/imp_util_ring_queue b/utilities/imp_util_ring_queue
deleted file mode 160000
index 61a122b..0000000
--- a/utilities/imp_util_ring_queue
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 61a122b22be15ef94e2d114a819aee8fb7f39e0d
diff --git a/utilities/imp_util_tlv_trans_protocol b/utilities/imp_util_tlv_trans_protocol
deleted file mode 160000
index 4671012..0000000
--- a/utilities/imp_util_tlv_trans_protocol
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 467101244b0d1042daa97df9c3895cd68d8fd3d9