The utility model discloses an adjustable four-side polishing device for wooden door production, and relates to the technical field of wooden door processing. The device comprises a rotary table for bearing a door plate, and further comprises an inverted L-shaped support frame, an electric telescopic rod is fixed to the lower surface of the inverted-L-shaped supporting frame. The electric telescopic rod is rotationally connected with a cylinder through a bearing; the lower end of the cylinder contacts the upper surface of the door plate; one end of a polishing assembly is fixed to one side ofthe bearing door plate. A fixed supporting frame is fixed to the lower surface of the grinding assembly. The polishing assembly comprises a first rectangular long cylinder and a second rectangular long cylinder; l-shaped fixing plates are fixed to the opposite surfaces of one ends of the second rectangular long cylinders correspondingly. A roller is fixed between the opposite surfaces of the two ends of the two L-shaped fixing plates respectively. The wooden door is rotated through the designed rotary table, the inverted-L-shaped supporting frame, the electric telescopic rod and the cylinder,the periphery of the wooden door is polished through the polishing assembly with the telescopic adaptation function, and the problem that time and labor are wasted when the periphery of an existing wooden door is polished is solved.