The work aims to design a set of valve pasting control system for paper and yarn compounding bag bottom-pasting machine with good stability, high valve pasting accuracy, high efficiency and continuity, to solve the problem that the current domestic valve pasting system is not continuous and the valve pasting accuracy is not high. The valve pasting control system adopted the continuous valve pasting control scheme, to match the automatic bottom-pasting equipment. The servo motor speed was con-trolled by the high-speed pulse output based on PLC, and the pulse counting of signals fed back by the incremental encoder was done with the high-speed counter; finally, the valve pasting was precisely controlled. After the valve pasting system was tested, within the allowable range of valve port position errors, the percent of pass of valve pasting could reach 97.9%. Through the precise control of the speed and valve pasting position of the servo motor, the continuity, stability, valve pasting accuracy and efficiency of the valve pasting control system are effectively improved.