The invention discloses a medical cleaning and sterilizing device. The medical cleaning and sterilizing device comprises a frame body, a supporting device, an air cylinder device, a feeding device and a spraying device, wherein a first through hole, an oblique plate, a liquid collecting plate, a cover body, a positioning plate, a spring, a triangular block, a second through hole and an attaching rod are arranged on the frame body; the supporting device comprises a supporting rod and a universal wheel; the spraying device comprises a spraying pipe, a buckling rod, a first valve and a spraying head; the air cylinder device comprises an air cylinder, a bracket, a connecting rod, a rectangular block, a cylindrical rod, a material distributing block and a vertical plate; the feeding device comprises a horizontal plate, a supporting block, a feeding pipe, a feeding hopper, a filtering net and a second valve; the material distributing block comprises an upper end part and a lower end part; the upper end part is shaped like a round table; the lower surface of the cylindrical rod is fixedly connected with the upper surface of the upper end part; the lower end part is cylindrical; a first round hole is formed in the material distributing block and enables the side surface of the upper end part to be communicated with the lower surface of the lower end part; the lower surface of he vertical plate is oblique; the upper surface of he vertical plate is fixedly connected with the lower surface of the material distributing block.