The present invention relates to an automatic glue sprayer, comprising a spray gun positioning portion and a positioning portion; in the spray gun positioning portion, the left and right ends of a frame are each fixedly provided with an X-direction power shaft, an X moving beam slides on two sliding rods of the frame and is powered by the aid of the X-direction power shaft, a Y-direction power shaft is fixed on the X moving beam, a Y moving seat slides on sliding rods of the X moving beam, the Y moving beat is powered to slide by the aid of the Y-direction power shaft, a Z1 shaft is fixed to the Y moving seat through a cross beam, a Z2 shaft slides on the Y moving seat, and both the tail ends of the Z1 shaft and Z2 shaft are connected with a spray gun; in the positioning portion, a first transmission mechanism is rotationally and fixedly provided with a revolving disc, inner left and right ends of the revolving disc are each fixedly provided with a second transmission mechanism, and the second transmission mechanisms are each rotationally and fixedly provided with a rotating disc; The automatic glue sprayer has both the function of fixed surface frame gluing and the function of stepwise skin gluing, allows for continuous loading and unloading and gluing, manpower and material resources are saved, and production efficiency is improved.