Abstract: In order to give lectures on nuclear engineering and nuclear technology without time and space restriction, this paper developed a network-based real-time PWR nuclear power plant simulation software (NUSOLSIM) using C/S model. The software modeling the system equipment of the core, primary circuit and secondary circuit of PWR nuclear power plant, has the capability to simulate typical nuclear power plant accidents in real time, with pause, save and graphic output buttons on the user interface. Finally, this paper uses NUSOLSIM software to analyze two DBC-2 events. The results show that the software has good performance in accident process analysis.