The invention discloses a closing tool for the portion, located at a wall, of a wood door. The closing tool comprises a blockboard base layer, stone plates, a lateral door frame and a door pocket line. The blockboard base layer is of a U-shaped integrated structure and wraps a wall opening, grooves are formed in the front surface and the rear surface of the blockboard base layer, and the stone plates are embedded into the grooves. Protruding parts are arranged on the lateral surface of the blockboard base layer, the lateral door frame is provided with a negative-outline groove matched with the protruding part, and the protruding part is squeezed into the groove and is fixed in a glued mode. Hinges are arranged on the outer surface of the blockboard base layer and further connected with a wood door sheet, and the door pocket line wraps the gap between the stone plate and the lateral door frame. The closing tool for the portion, located at the wall, of the wood door facilitates continuous position adjustment for leveling during installation, damaged components can be independently replaced when worm damage occurs, and thus the mounting and repairing cost is lowered.