Foam cutting machine with blades convenient to replace

The utility model discloses a foam cutting machine with a blade convenient to replace. The device comprises a transverse plate, a U-shaped mounting plate, a first L-shaped mounting plate, a second L-shaped mounting plate and a working platform, the first L-shaped mounting plate, the U-shaped mounting plate and the second L-shaped mounting plate are sequentially mounted at the bottom of the transverse plate from left to right. A cutting knife is rotationally arranged in an inner cavity of the U-shaped mounting plate through a fixed rotating shaft and a movable sleeve shaft; the fixed rotating shaft penetrates through the side wall of one side of the U-shaped mounting plate and is fixedly connected with the output end of a driving motor; the movable sleeve shaft penetrates through the side wall of the other side of the U-shaped mounting plate and is connected with the sliding piece; a connecting rod is hinged to the sliding piece and rotationally installed on the edge of a rotary disc based on a rotary shaft, t