The main function of the ships lubricating oil system is to provide lubricating oil that meets the quality and quantity requirements for the power unit to ensure the normal lubrication,cooling,anti-corrosion,cleaning,and power transmission of moving parts.Under different operating conditions,the internal parameters of the lubricating oil system will change significantly，which will affect the normal operation of the ship system.MATLAB Simulink was used to simulate the lubricating oil system based on the actual use demand and operation of the project to maximize its benefits.The simulation was mainly introduced from several aspects,such as startup stage,stability stage,shutdown stage,fault stage,etc,to restore the actual operation of the oil system to the greatest extent.The results show that the simulation technology can effectively simulate the operation of marine lubrication system under various working conditions,help to optimize the system design and operation strategy,maximize the benefits of lubrication system,and ensure the normal operation of marine system.