Concrete waste recovery system

The utility model discloses a concrete waste recovery system which comprises a box body, the top of the box body is provided with a feed port, the lower part of the box body is provided with a discharge port, the upper end of the inner wall of the box body is rotatably connected with a first crushing roller and a second crushing roller, and the first crushing roller and the second crushing roller are respectively driven by a motor and rotate in opposite directions; a grinding assembly is installed on the lower portion of the inner wall of the box body and comprises a grinding wheel and a grinding plate, the grinding plate is installed on the inner wall of the box body, the grinding wheel is rotationally arranged at the top end of the grinding plate and driven by a stepping motor to rotate, and screen holes and grinding blocks are arranged on the top face of the grinding plate. According to the concrete crushing device, the diameter selection of falling concrete can be adjusted according to the use requirement