The dynamic characteristics of the hydraulic lift loop of the steel arch mounting machine are analyzed by taking the CBCA plugin balancing valve as a study object. According to the valve structure, the mechanical balance valve equation was established. The load, spring stiffness and damping hole were calculated and set according to the actual working condition. The structure model of bayonet balance valve was established and simulated by using AMESim simulation software. The simulation results reveal the effects of spring stiffness, damping hole and other parameters on the performance of the bolted balancing valve, which provide references for its optimal design and matching of parameters.