To address the challenge of difficult recovery of subsea structures on sandy coasts caused by excessive anchoring force,the experimental research on the anchoring bearing capacity of subsea structures is conducted in this paper.A simplified experimental device model of subsea structures is built to simulate the anchoring-lifting and anchoring-overturning processes in a sandy coastal environment.The control variable method is adopted to adjust the anchoring depth and total mass of the structure,while high-precision measuring equipment is used to collect anchoring bearing capacity data.On the basis of the experimental data,a multiple linear regression model is applied to quantify the influence rule of anchoring depth and total structural mass on the bearing capacity.The results indicate that both anchoring depth and total structural mass have a positive impact on vertical and lateral bearing capacities,showing an approximately linear relationship.The regression models exhibit good fitting performance,with the coefficient of determination R2 being 0.904 for the vertical bearing capacity model and 0.974 for the lateral bearing capacity model.In anchoring design,it is suggested that on the premise of ensuring the anti-overturning performance of the structure,the anchoring depth and total structural mass should be reasonably determined to balance anti-overturning performance and recoverability.