For the situation that effective monitoring was lacked for the working conditions of automobile engine pressing machine,a set of health monitoring system software was developed by using C++ language.In this system,the acquired vibration signal was analyzed by using frequency spectrum analysis, power spectrum estimation and modal analysis methods.The amplitude spectrum, power spectrum and modal parameter list of the vibration signal were obtained to monitor the working status and structure features of the pressing machine. After testing the system on a gearbox experiment platform, the result shows that the system can be used to monitor the vibration conditions of gearbox and to identify the frequency components of typical fault accurately.