Coating spraying device

The utility model relates to the technical field of coating spraying, in particular to a coating spraying device which comprises a nozzle, a material passing pipe and a coating tank, the coating tank is connected with the nozzle through the material passing pipe, a moving block fixedly connected with the nozzle is arranged at the tail end of the nozzle, supporting columns are arranged on the left side and the right side of the moving block, and a first reciprocating screw rod is arranged in the moving block. The moving block is matched with the first reciprocating screw rod, connecting bases rotationally connected with the first reciprocating screw rod are arranged at the two ends of the first reciprocating screw rod correspondingly, a first motor fixedly connected with the connecting base is arranged on one connecting base, fixing rods are arranged at the upper end and the lower end of the first reciprocating screw rod on the moving block, and the two ends of each fixing rod are fixedly connected with the tw