diff --git a/ding/worker/learner/comm/base_comm_learner.py b/ding/worker/learner/comm/base_comm_learner.py
index a7234e0e7a..4a9562888f 100644
--- a/ding/worker/learner/comm/base_comm_learner.py
+++ b/ding/worker/learner/comm/base_comm_learner.py
@@ -116,6 +116,7 @@ def _create_learner(self, task_info: dict) -> 'BaseLearner':  # noqa
             setattr(learner, item, getattr(self, item))
         # Set policy in created learner.
         policy_cfg = task_info['policy']
+        policy_cfg = EasyDict(policy_cfg)
         learner.policy = create_policy(policy_cfg, enable_field=['learn']).learn_mode
         learner.setup_dataloader()
         return learner