The invention discloses a firearm based on a mobile phone app. The firearm comprises a box body, a working cavity is fixedly formed in the box body, the front and rear end walls of the working cavityare connected with left-and-right symmetrical cavity inner rods, main rods and symmetrical rods in a normal running fit mode, a driven meshing wheel and a through wheel are fixedly arranged on the outer surface of each cavity inner rod, rotating teeth are fixedly arranged on the outer surface of the main rod on the left side, rotating teeth and a wrench are fixedly arranged on the outer surface ofthe main rod on the right side, a driven edge wheel and a main bevel gear are fixedly arranged on the outer surface of each symmetrical rod, the driven meshing wheels are meshed with the rotating teeth, a sliding groove is fixedly formed in the rotating teeth and connected with the rear end wall of the working cavity in a sliding fit mode, the driven edge wheel and the through wheel are connectedin a power mode by a belt, and a driven bevel gear is arranged on the upper side of the main bevel gear in a meshed mode. The firearm is simple in structure and convenient to use, the equipment automation is achieved through the joint operation mechanism, the efficient generation and release of the compressed gas are efficiently completed, and the shooting coherence and the speed are improved.