The axial piston motor is the power component of actuator in hydraulic system. Serious vibration and noise during its operation will cause transmission failure, fluid leakage and other major problems.Based on transfer path analysis, the vibration, noise generation mechanism and transmission path of a axial piston motor during operation were analyzed theoretically.Based on AMESim and ADAMS platform, taking the mechanical structure as core, hydrodynamic characteristics was introduced to set up the axial piston motor machine-liquid coupling model, the dynamic and static characteristic and operating mechanism of the vibration and noise were analyzed further.It was pointed out that the purpose of vibration damping noise reduction could be realized by optimizing the valve plate and motor shell structure. The comparison with the referenced data of hydraulic motors in relevant literatures shows that the relative error of the output characteristics is less than 6%, and the motion characteristics conform to the theoretical model.The simulation evaluation instead of overall performance evaluation of the physical prototype can effectively shorten product development cycle and reduce development cost.