A new fault diagnosis method for mechanical system is proposed based on the vibration visualization technology. The vibration visualization technology supplements the routine monitoring method aiming at mechanical vibration signal, which may contains the synchronization time and frequency domain changes as the basis of the fault diagnosis system. Firstly, the moving parts with simple function are set as the research object on the application feasibility of visualization technology. Secondly, the analysis of multi-channel vibration signal is applied as the diagnosis input for mechanical system. The application results showt hat the fault diagnosis method based on mechanical vibration visualization technology can simplify the process of finding the fault source in complicated mechanical system effectively, while the matching velocity of the failure modes is improved.