The work aims to solve the problems of rotation failure, serious part damage, air motor damage and glue gun blockage in the YB28 spraying system. By analyzing the original structure malfunction through failure analysis, a dual cold glue spraying system for stamp was designed. The glue gun adopted straight motion instead of rotary motion when entering the station and then sealed and glued the label based on the phase signal of the encoder of the main drive shaft. The spraying angle of dual nozzles and spraying gun was designed to ensure uniform spraying and the rubber tube supply pipeline and agitator device of rubber barrel were improved to reduce the risk of blocking the rubber tube supply pipeline. A new indicator for mixing was installed in the rubber barrel, and the agitator motor was connected to YB28 control system. When the device stopped, the nozzle cleaning device cleaned and sealed the glue gun. Taking the YB28 soft box packaging machine for producing "Yuxi Ruan" as the test object, experiments were conducted on the improved dual stamp spraying system. After the improvement, the breakage number of wire harness was reduced by 50%, the number of glue blockage was reduced by 62.5%, the number of agitator failures was reduced by 92.9% and the efficiency increased by 1.1%. After the dual cold glue spraying system is put into use, the maintenance frequency and time are reduced and the packaging efficiency and quality of cigarette are improved.