Environment-friendly dust removal device for steel member shot blasting machine

The utility model discloses an environment-friendly dust removal device for a steel member shot blasting machine, and relates to the technical field of dust removal and environmental protection of steel members. A shell of the dust removal device is in a U shape and is communicated with an outlet of the shot blasting machine, supporting devices are arranged on the two sides of the shell, dust suction pipelines are arranged on the supporting devices, one ends of the dust suction pipelines face the interior of the shell, the other ends of the dust suction pipelines are communicated with a feeding port of a negative pressure box, a negative pressure pump is arranged at the top of the negative pressure box, and a discharging port of the negative pressure box is communicated with a sand hopper. A shot-ash separating device is arranged in the negative pressure box; the soot blowing device comprises an air guide pipe and an air blowing opening, one end of the air guide pipe is connected with the fan, the other end o