Abstract: In the seismic risk analysis for the nuclear power plant, the appropriate data processing method and analytical technique are required. In this study, seismic risk quantification software is developed independently for the first time in China. It uses Monte Carlo sampling method to simulate the seismic frequencies and component conditional failure probabilities, and integrates with accident sequences to assess the plant seismic risk. This method overcomes the shortcomings of the traditional probabilistic risk assessment modelling software in the seismic risk evaluation. Compared with the similar software abroad, this software is more reasonable in the uncertainty process.