The utility model relates to a double-glue mixing pneumatic glue gun, which comprises a glue inlet unit A, a glue inlet unit B, a connecting base, a synchronous glue inlet device and a mixing nozzle component, wherein two glue inlet units are fixedly arranged on the connecting base, and the glue outlet ends of the two glue inlet units are installed on the synchronous glue inlet device; and the mixing nozzle component is installed on the synchronous glue inlet device. Two glues are respectively controlled through the two glue inlet units to synchronously enter into the mixing nozzle component through the synchronous glue inlet device from a glue inlet valve pocket, the two different glues are repeatedly stirred and mixed uniformly through a cone sleeve and a positive spiral rod and a negative spiral rod in the mixing nozzle component, and further, the purpose of glue application after uniform mixing is achieved. When glue application needs to be stopped, only the air inlet states of two air inlet joints are switched over. As a pneumatic valve and the glue inlet valve pocket are integrated, the structure is more compact. The tail part of the pneumatic valve adopts a fine adjustment structure, so that the stroke of a piston rod can be adjusted, the seal precision can be recovered through the fine adjustment structure after the head part of the piston rod is abraded, and further, the service life is prolonged.