diff --git a/docs/changes.md b/docs/changes.md
index 1ccb2f4de..6b52d6a6f 100644
--- a/docs/changes.md
+++ b/docs/changes.md
@@ -2,6 +2,7 @@
 
 2025/04/15
   * 增加mem_allocator_fixed_block，dlist/slist/tree使用该内存分配器管理内存(感谢兆坤提供补丁)。
+  * 完善mem_allocator_fixed_block(感谢兆坤提供补丁)。
 
 2025/04/14
   * conf_io 支持 YAML格式。
diff --git a/src/tkc/dlist.c b/src/tkc/dlist.c
index dc68e510a..29cf42593 100644
--- a/src/tkc/dlist.c
+++ b/src/tkc/dlist.c
@@ -30,10 +30,12 @@ static dlist_node_t* dlist_create_node(dlist_t* dlist, void* data) {
   if (dlist->node_allocator != NULL) {
     ret = mem_allocator_alloc(dlist->node_allocator, sizeof(dlist_node_t), __FUNCTION__, __LINE__);
   } else {
-    ret = TKMEM_ZALLOC(dlist_node_t);
+    ret = TKMEM_ALLOC(sizeof(dlist_node_t));
   }
   return_value_if_fail(ret != NULL, NULL);
 
+  memset(ret, 0, sizeof(*ret));
+
   ret->data = data;
 
   return ret;
diff --git a/src/tkc/mem_allocator_fixed_block.c b/src/tkc/mem_allocator_fixed_block.c
index f3ed91ede..ebfcfdf58 100644
--- a/src/tkc/mem_allocator_fixed_block.c
+++ b/src/tkc/mem_allocator_fixed_block.c
@@ -186,10 +186,13 @@ inline static mem_allocator_fixed_block_pool_t* mem_allocator_fixed_block_pool_c
   mem_allocator_fixed_block_pool_t* ret = NULL;
   return_value_if_fail(allocator != NULL && num > 0, NULL);
 
-  ret = TKMEM_CALLOC(1, MEM_ALLOCATOR_FIXED_BLOCK_POOL_SIZE(allocator->size, num));
+  ret = TKMEM_ALLOC(MEM_ALLOCATOR_FIXED_BLOCK_POOL_SIZE(allocator->size, num));
   return_value_if_fail(ret != NULL, NULL);
 
   ret->num = num;
+  ret->used_units = NULL;
+  ret->unused_units = NULL;
+  ret->next = NULL;
 
   mem_allocator_fixed_block_pool_init(allocator, ret);
 
diff --git a/src/tkc/slist.c b/src/tkc/slist.c
index cfd8a6d76..7607f6e3e 100644
--- a/src/tkc/slist.c
+++ b/src/tkc/slist.c
@@ -30,10 +30,12 @@ static slist_node_t* slist_create_node(slist_t* slist, void* data) {
   if (slist->node_allocator != NULL) {
     ret = mem_allocator_alloc(slist->node_allocator, sizeof(slist_node_t), __FUNCTION__, __LINE__);
   } else {
-    ret = TKMEM_ZALLOC(slist_node_t);
+    ret = TKMEM_ALLOC(sizeof(slist_node_t));
   }
   return_value_if_fail(ret != NULL, NULL);
 
+  memset(ret, 0, sizeof(*ret));
+
   ret->data = data;
 
   return ret;
diff --git a/src/tkc/tree.c b/src/tkc/tree.c
index 0c03c33bd..977f91f63 100644
--- a/src/tkc/tree.c
+++ b/src/tkc/tree.c
@@ -254,10 +254,12 @@ static inline tree_node_t* tree_node_create(void* data, mem_allocator_t* allocat
   if (allocator != NULL) {
     ret = mem_allocator_alloc(allocator, sizeof(tree_node_t), __FUNCTION__, __LINE__);
   } else {
-    ret = TKMEM_ZALLOC(tree_node_t);
+    ret = TKMEM_ALLOC(sizeof(tree_node_t));
   }
   return_value_if_fail(ret != NULL, NULL);
 
+  memset(ret, 0, sizeof(*ret));
+
   ret->data = data;
 
   return ret;