diff --git a/pipeline_service/sdlc_ability.py b/pipeline_service/sdlc_ability.py
index a3c3d67..597e649 100644
--- a/pipeline_service/sdlc_ability.py
+++ b/pipeline_service/sdlc_ability.py
@@ -34,6 +34,7 @@ SDL_TOOLS = [
             "title": "任务标题",
             "role": "目标角色(requirement/design/develop/test/deploy)",
             "description": "任务详细描述",
+            "iteration_id": "归属迭代(可选，默认当前迭代)",
         },
         category="task",
     ),
@@ -320,13 +321,27 @@ async def _h_create_task(sor, p, ctx):
     role = _normalize_role(role)
 
     tid = getID()
+    # 迭代归属：显式指定 > 当前迭代（该 project 最新创建的迭代）。
+    # 「当前迭代」概念：新建迭代后当前迭代即新建的那个，任务默认归到它。
+    iteration_name = (p.get("iteration_id", "") or "").strip()
+    if not iteration_name:
+        irecs = await sor.sqlExe(
+            "SELECT iteration_name FROM sd_iterations WHERE project_id=${pid}$ ORDER BY created_at DESC LIMIT 1",
+            {"pid": pid})
+        if irecs:
+            iteration_name = getattr(irecs[0], 'iteration_name', '') or ''
+
+    params = {"description": desc}
+    if iteration_name:
+        params["iteration_id"] = iteration_name
+
     await sor.C("pipeline_tasks", {
         "id": tid, "tenant_id": pid, "pipeline_id": "role_task",
         "owner_id": ctx.get("user_id") or "user", "title": title,
         "state": "submitted", "role": role,
-        "params": json.dumps({"description": desc}, ensure_ascii=False),
+        "params": json.dumps(params, ensure_ascii=False),
     })
-    return f"OK: 已创建任务 {title}（角色: {role}）"
+    return f"OK: 已创建任务 {title}（角色: {role}，迭代: {iteration_name or '未分配'}）"
 
 
 async def _h_list_tasks(sor, p, ctx):
@@ -819,7 +834,7 @@ async def _resolve_iteration_id(sor, pid, iteration_id):
             return full, ""
         return "", f"迭代不存在: {iteration_id}"
     recs = await sor.sqlExe(
-        "SELECT id FROM sd_iterations WHERE project_id=${pid}$ ORDER BY created_at ASC LIMIT 1",
+        "SELECT id FROM sd_iterations WHERE project_id=${pid}$ ORDER BY created_at DESC LIMIT 1",
         {"pid": pid})
     if recs:
         return getattr(recs[0], "id", ""), ""