The utility model discloses a quantizable glue gun, and aims at solving the disadvantages that the glue outlet amount of the existing glue gun is inconvenient to adjust and the gluing operating is inconvenient. The glue gun comprises a glue gun body, the glue gun body is hinged with a glue outlet adjusting handle, the front end of the glue gun body is connected with a gun barrel, the rear end of the glue gun is provided with a handle, the glue outlet adjusting handle is in threaded connection with an adjusting bolt, the front end of the adjusting bolt is supported on the handle, the front end of the gun barrel is provided with a mounting base, a limiting strut is adjustably connected on the mounting base, and the front end of the limiting strut exceeds the front end of the gun barrel. The glue outlet amount of the glue gun is convenient to adjust, the bearing support of the glue gun in gluing is convenient and reliable, and the gluing operation of the worker is convenient.