NOVELTY - The device has cutting screen (11) with hole installed at left opening in extruding box (3). A cutting blade (12) is installed on transmission rod (6). A spring (13) is installed on transmission rod between cutting blade and cutting screen. A water inlet pipe (14) is installed on top of feeding barrel (1). A sewer valve (15) is provided at bottom of propulsion blending bin (2). A sealing sleeve (16) is arranged at a position where transmission rod goes through right wall of propulsion blending bin. A discharging baffle (17) is provided at left side of the discharging box (4).    USE - Material crushing and bending device for use in biogas engineering.    ADVANTAGE - Provides a material crushing and blending device that uses the spring to ensure that proper interval crushes long grass in the material, while avoiding the long grass winding the cutting blade. Includes a screw edge that promotes and adds the stirring function. Ensures increased flowing speed while at the same time prevents dry dung from jamming the pipe opening of water inlet pipe, thus improving raw material processing amount.    DETAILED DESCRIPTION - The rectangular feeding barrel is provided without bottom. The lower opening of the feeding barrel is connected with upper opening of propulsion blending bin by bolt. The left side of the propulsion blending bin is opened, such that the opening is connected with opposite opening of extruding box adjacent to the propulsion blending bin. A discharging box is provided at left side of the extruding box, such that the discharging box and extruding box are connected through two opposite openings. The propulsion blending bin, extruding box and discharging box are all provided on a bracket (5). The transmission rod goes through the propulsion blending bin, extruding box and discharging box. A screw edge on the transmission rod is provided in the propulsion blending bin and extruding box. The shaft of motor (7) is connected to the left end of the transmission rod by belt pulley (8) and transmission belt (9). Two ends of the transmission rod are installed on the bearing seat (10).    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic sectional view of the material crushing and blending device.    Feeding barrel (1)    Propulsion blending bin (2)    Extruding box (3)    Discharging box (4)    Bracket (5)    Transmission rod (6)    Motor (7)    Belt pulley (8)    Transmission belt (9)    Bearing seat (10)    Cutting screen (11)    Cutting blade (12)    Spring (13)    Water inlet pipe (14)    Sewer valve (15)    Sealing sleeve (16)    Discharging baffle (17)