Hopper truck capable of preventing materials from falling off from edge

The hopper truck capable of preventing the materials from falling off from the edge comprises a supporting frame, wheels and a containing hopper, the wheels are connected to the lower portion of the supporting frame, the containing hopper is arranged on the top of the supporting frame, a sliding block is arranged on the inner wall of the containing hopper, a heightening seat is arranged in the containing hopper, and the heightening seat is connected with the sliding block. A sliding groove connected with the sliding block is formed in the outer side of the heightening seat; a baffle is movably connected to one end of the heightening seat, a notch is formed in the inner wall of the heightening seat, a limiting seat is arranged above the containing hopper, and a fastening screw penetrates through the top of the limiting seat. According to the hopper truck capable of preventing the materials from falling off from the edge, the materials are prevented from falling off from the edge of the transfer device through