Automatic overflow material recovery device of screw extruder

The utility model discloses an automatic overflow material recovery device of a screw extruder. The automatic overflow material recovery device comprises an undercutting mechanism, a chute, a receiving hopper, a transverse conveying mechanism and a lifting conveying mechanism, the undercutting mechanism is installed at an exhaust hole of the screw extruder, overflowed materials discharged from the exhaust hole are cut into material blocks, the cut material blocks are pushed to the material sliding groove, the material sliding groove is located below the undercutting mechanism and is obliquely arranged relative to the horizontal plane, and the material blocks enter a material receiving hopper located at one end of the transverse conveying mechanism along the material sliding groove under the action of gravity; the transverse conveying mechanism transversely conveys the receiving hopper from one end of the transverse conveying mechanism to the other end of the transverse conveying mechanism; the lifting and con