As ship power system continues to expand the scale, the workload of the calculation and analysis is growing. Using computer technology to create an object-oriented ship power system simulation platform will play an important role on the overall power system design and performance evaluation. In this paper, we add simulation application algorithm further based on the established graphical simulation interface, to achieve the steady-state simulation of ship power system analysis. Establish the network topology analysis module and the power flow analysis module, and combining with SQL database design the interface between with each simulation functional modules, and with the graphics system, to achieve the data transmission. Finally, an example of power flow calculation is carried out, the result shows that the simulation software runs reliable, and has the flexibility and scalability.