Dust blowing gun

The utility model discloses a dust blowing gun. According to the technical scheme, the dust blowing gun comprises a gun body, a trigger, a valve rod and a valve base arranged at one end of the valve rod in a sleeving mode; the gun body comprises an air guide channel, the valve base is connected in the air guide channel in a sliding mode, the valve base stretches out of the gun body to abut against the trigger, the trigger is hinged to the outer side wall of the gun body, the valve rod moves in the air guide channel through the valve base in the rotating process of the trigger, the valve rod is provided with an opening and closing device, and the opening and closing device controls opening and closing of the air guide channel through the valve rod. The valve rod is provided with a positioning device, and the positioning device is used for positioning of the valve rod. The valve rod is further provided with a reset device, and the reset device is used for controlling reset of the valve rod and making the air guide channel to be closed. By means of the dust blowing gun, the dust blowing gun can keep continuous air injection without pressing the trigger with the hands all the time when the working staff use the dust blowing gun to conduct cleaning, and the effect of conducting the dust blowing work for a long time is facilitated.