In order to obtain the realtime energy consumption data of fine blanking hydraulic press, the mathematical model of the whole machine energy consumption was established by studying the energy flow, transformation and dissipation process of the hydraulic press in the unit working cycle. Based on virtual instrument technology, a platform for realtime monitoring the energy consumption of the fine blanking machine was built. The simulation result shows that the realtime data of energy consumption of the hydraulic system can be obtained by using this platform, which provides reference for optimizing the structure and improving the energy utilization ratio of the hydraulic system.