With the advancement of China's “Belt and Road” initiative,the scale and number of ships and ports have been increasing,and the study of mooring stability conditions is becoming increasingly important.This paper analyzes the impact of mooring stability conditions on ship mooring systems based on ship simulation experiments.By establishing ship motion and environmental load models,the stress response of cables with different materials and diameters under complex environmental conditions is simulated,verifying the accuracy and feasibility of the ship handling simulator.The results show that the roll motion of the moored vessel is a key factor affecting the stress of the mooring line.Increasing the pre tension of the cable within a certain range or using cables with higher elongation can effectively reduce cable stress.Wave height significantly affect rope stress,especially when the coupled wave period is close to the ship's roll period.The research provides scientific basis for port design and ship mooring,and proposes suggestions for improving the stability of mooring systems.