The invention discloses a non-stop automatic screen changer comprising a front shell, a support plate, a motor bracket, a rotating motor, a speed reducer, a rear shell, a gear disk, a gear housing, adriving gear, a filter plate and filter screen clamping slots. Fixing plates are fixedly welded on the top of one side of the front shell symmetrically, and the top of each fixing plate is fixedly connected with the motor bracket by bolts; one side of the motor bracket is fixedly provided with the rotating motor, and an output shaft of the rotating motor is fixedly provided with the speed reducer;an output shaft of the speed reducer is fixedly provided with the driving gear, and the side, far away from the fixing plates, of the front shell is provided with the rear shell; and the top end of the rear shell is fixedly connected with the motor bracket by bolts, and the gear disk is arranged between the front shell and the rear shell. According to the non-stop automatic screen changer, filterscreens can be replaced under the non-stop condition of a plastic extruding machine, not only is the machining speed of the plastic extruding machine increased, but also the efficiency of the plasticextruding machine is improved.