A cleaning device that can quickly clean up wastes of plastic injection molding machines: The utility model discloses a cleaning device that can quickly clean up wastes of plastic injection molding machines, comprising a support plate and an electric control box, the upper surface of the electric control box is fixedly connected with a Two electric slide rails, an electric slider is slidably connected in the electric slide rail, a hot-melt box is fixedly connected between the two electric sliders, a feed hopper is fixedly connected to the top of the hot-melt box, and one side of the hot-melt box is fixed A feeding pipe is connected, the top of the support plate is fixedly connected with an injection molding box, one side of the outer wall of the bottom of the injection molding box is fixedly connected to one side of the outer wall of the top of the electric control box, and one side of the injection molding box is provided with a connecting pipe, and the connecting pipe The other end of the injection molding box is plugged with the other end of the feeding pipe, and the bottom of the injection box is fixedly connected with a discharge hopper. The utility model can quickly clean up the waste material in the plastic injection molding machine, ensure the effect and quality of the subsequent injection molding, and can also avoid the phenomenon that the injection molding liquid blocks the feeding pipe, and ensure the normal progress of the injection molding work.