The utility model discloses a mechanical degreasing test device. Experimental shell, the inner wall of the bottom of the experiment shell is connected with a waterproof shell through a bolt; the innerwall of the bottom of the waterproof shell is connected with a servo motor through a bolt; an output shaft of the servo motor is connected with a hydraulic rod through a bolt; and the outer wall of the top of the hydraulic rod is connected with a rotating disc through bolts, the outer walls of the two sides of the top of the rotating disc are connected with electric telescopic rods through bolts,the outer walls of the opposite sides of the two electric telescopic rods are connected with fixing blocks through bolts, and arc-shaped pressing plates are arranged on the outer walls of the opposite sides of the two fixing blocks. According to the degreasing device, by arranging the electric telescopic rod, the fixing block, the telescopic spring and the arc-shaped pressing plate, a part to bedegreased can be fixed and cannot move in the degreasing process, the degreasing quality is improved, by arranging the hydraulic rod, people can conveniently take and fix the part, and the working efficiency is improved.