Extrusion soil breaker

The invention discloses an extrusion soil breaker, which comprises a frame, a left wallboard, a right wallboard, a screw shaft, a casing and a pulley. The left wallboard and the right wallboard are disposed on the frame, the screw shaft supported via bearing blocks penetrates through the left wallboard and the right wallboard, the casing with a feeding port and a discharging port is fixedly connected to the left wallboard and the right wallboard, the pulley disposed on the screw shaft is driven by a motor, breaking claws are evenly distributed on a screw vane (2) on the screw shaft (3) inside the casing (11), a cylindrical screen (10) connected to the left and right wallboards (8) is radially arranged between the screw vane and the casing, a pressure disc (9) with evenly and peripherally distributed pressure claws (18) is sleeved on the screw shaft inside the cylindrical screen, and the pressure disc and the left wallboard adjacent to the same are provided with anti-rotating holes (19 and 20) respectively and correspondingly connected through anti-rotating pins (21). Impurities and bricks in soil can be effectively separated from the soil while soil breaking and screening functions are achieved by using the extrusion soil breaker, and the extrusion soil breaker is simple and compact in structure, convenient in disassembly and maintenance, low in cost, low in vibration, low in noise, low in power consumption and widely applicable.