The utility model provides a light people's air defense door, it includes door frame, door leaf, sealing member, monolever linkage locking and hinge page or leaf, the door leaf is the light door leaf, and the door leaf is connected through the hinge page or leaf is articulated with the door frame, the monolever linkage locking of setting on the door leaf includes outer handle, through first horizontal slewing mechanism in order to set up in the outside of door leaf around horizontal axis pivoted mode, monolever linkage locking is including all setting up in the outer handle and the interior handle of the inboard of door leaf in order to wind horizontal axis pivoted mode through first horizontal slewing mechanism, a plurality of tapered ends, the circumference of following the door leaf sets gradually in the inboard of door leaf, and every tapered end rotates around the horizontal axis, a plurality of connecting rods, head and the tail connect gradually that to form one side open -ended square, set up in the inboard of door leaf with being square a plurality of connecting rod moving as a wholes, are connected with interior rotate handle for one in a plurality of connecting rods, and corresponding rotation is connected with the tapered end on a plurality of connecting rods. The utility model is simple in operation, labour saving and time saving for the joint strip compression is even, and is airtight reliable.