Reciprocating sand blasting machine

The utility model relates to the technical field of machinery, in particular to a reciprocating type sand blasting machine, which is characterized in that a plurality of groups of slide rails are arranged at the top end in a rack, nozzles are arranged on the plurality of groups of slide rails, a feeding hole is formed in the right side of the rack, a rack door is arranged on the right side of the rack, the rack door is rotatably connected with the rack, and a placing groove is formed in the left side of the rack; a first motor is arranged at the upper end of the containing groove, an air pump is arranged at the lower end of the containing groove, the first motor drives the spray head to move along the multiple sets of sliding rails, and the air pump controls the spray head to be opened and closed. A guide rail is arranged on the auxiliary frame, a sliding block is arranged at the upper end of the guide rail, and a second motor is arranged at the lower end of the auxiliary frame and drives the sliding block to