Abstract: So far, the accident for Chinese current “two generation plus” pressurized water reactor nuclear power plant is usually only analyzed to the controlled condition. But Fukushima accident indicated that this analysis was not comprehensive, so the full range of accident should be analyzed. SBLOCA makes the greatest contribution for core damage frequency (CDF). The CATHARE was used to analyse the full range of accident for SBLOCA plus loss of HHSI which happens at the Chinese current “two generation plus” pressurized water reactor, and the analysis results were acquired. Based on the results, the weaknesses of the existing power plant were pointed out, and the improvement measures were given.