This material is the courseware of common quality problems in civil air defense acceptance, including: the door leaf is flexible to close and open, the door leaf needs to remain stationary under powerless action, the locking activity is relatively sensitive, the external surface of the door leaf should be marked with the direction of the locking switch, the civil air defense hook should be set above the civil air defense door according to the design requirements, and the hook should hook the upper steel of the roof, etc.