Ash removal negative pressure vehicle suitable for boiler

The ash removal negative pressure vehicle comprises a cart carriage, a machine box is fixedly installed at the position, close to the upper end, of one side of the cart carriage, a carrying box is fixedly installed at the position, close to the rear portion, of the top end of the cart carriage, and a machine cover is fixedly installed in the middle of the top end of the carrying box. The top end of the carrying box and the top end of the horizontal section of the cart compartment are provided with the same knocking assembly, blocking pieces are fixedly installed at the positions, close to the front ends, of the two sides of the cart compartment, pull rods are movably connected to the positions, close to the front portions, of the two sides of the cart compartment in a bridging mode and located at the upper ends of the blocking pieces, and a dust accumulation box is arranged in the cart compartment and penetrates through the lower end of the front face of the cart compartment. A filter screen is movably mounte