Blasting tube fixing device

The utility model discloses a blasting tube fixing device which comprises a lower tube body, an upper tube body and supporting blocks, the lower tube body is arranged at the bottom of the upper tube body, the supporting blocks are arranged on the front side and the rear side of the upper tube body, a shell is arranged at the bottoms of the supporting blocks, a shell is arranged at the bottom of an inner cavity of the shell, and the lower tube body is arranged at the bottom of the inner cavity of the shell. A fixing assembly is arranged at the top of an inner cavity of the shell, and a control assembly used in cooperation with the fixing assembly is arranged at the bottom of the inner cavity of the shell. Through cooperative use of a supporting block, a shell, a fixing assembly and a control assembly, a user pulls a pull block, the pull block drives a moving block to move in an inner cavity of a sliding groove, the moving block drives a movable rod to rotate through a second limiting column, the movable rod dr