Abstract: With the continuous advancement of modern engineering technology, the aviation industry is experiencing growing demands. The iteration speed of aircraft landing gears and their subsystem components is accelerating, accompanied by increasing complexity. However, existing material conditions and engineering capabilities are insufficient to efficiently and flexibly conduct a large number of physical tests within short deadlines. This paper utilizes co-simulation between Simulink and SolidWorks to achieve simulation and visualization of the aircraft landing gear retraction subsystem. On this basis, fault simulation and verification of the landing gear retraction function are conducted, including the simulation of fault conditions on the visual.