Grinding machine for food detection pretreatment

The utility model discloses a grinding machine for food detection pretreatment, which comprises a shell and an outer barrel, the outer barrel is fixed at the top of the shell, a motor is fixedly connected inside the shell, a transmission shaft is vertically and rotatably connected to the top of the shell, an inner barrel is arranged in the outer barrel, a cover body is arranged at the top of the inner barrel, and a sliding block is vertically and slidably connected to the middle of the cover body. The center of the sliding block is rotationally connected with a rotating shaft, the surface of the rotating shaft is connected with a grinding cutter set through a connecting rod, the bottom end of the rotating shaft is provided with a hexagonal hole, the hexagonal hole is internally connected with the sliding block through a spring, a threaded hole in the top end of the transmission shaft is internally in threaded connection with an adjusting screw rod, and the top end of the adjusting screw rod is fixedly connect