The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a gluing device for a flexo folder gluer machine. It has an independent functional structure and can be disassembled and moved on the gluer according to the needs of different carton box types. The glue position and glue length can be adjusted conveniently and flexibly. In order to solve the above technical problems, the gluing device of the flexo folder gluer machine of the present invention includes a glue storage tank, a glue pressing mechanism, a glue control system, a spray gun, a spray gun fixing seat, a frame and a spray gun positioning rod. The glue pressing mechanism is arranged above the glue storage tank, and the glue pressing mechanism is connected with the glue pressing control system through a pressure pipe. The glue storage tank is connected with the spray gun through a glue outlet pipe, and an electric eye is arranged on the glue outlet pipe. The frame comprises a base and a machine post, and the fixed seat of the spray gun is arranged on the flexo folder gluer machine post. The positioning rod of the spray gun is arranged above the conveyor belt of the processed products, and the spray gun can be fixed at any position of the positioning rod of the spray gun. The gluing device of the flexo folder gluer machine of the utility model fixes the spray gun at the corresponding position of the spray gun positioning rod according to the requirements of the carton box type, and the electric eye on the glue outlet pipe transmits the signal to the glue control system, so that the glue control system can be controlled at any time The position of the spray gun and the amount of glue. After the processing is completed, the spray gun can be disassembled from the spray gun positioning rod and placed on the spray gun fixing seat of the frame again. The gluing device of the flexo folder gluer machine is completely separated from the flexo folder gluer machine. Therefore, compared with the prior art, the gluing device for the flexo folder gluer machine of the present invention has the following advantages. It has an independent functional structure and can be disassembled and moved on the flexo folder gluer machine according to the needs of different carton box types. It has flexible adjustment of gluing position and gluing length.