As a common type of high-piled pier structure in harbors,the optimization of pile arrangement for mooring dolphin is a complex nonlinear problem.Traditional methods based on experience and adjustment encounter difficulties in handling this issue.This paper establishes a mathematical model for optimizing pile arrangement based on the classic genetic algorithm.By binary encoding various pile foundation parameters and combining with the post-processing strategy for pile collision constraints,and using computer programming languages,the genetic iterative evolution of pile arrangement for mooring dolphin is implemented.The optimization results of the model demonstrate that the application of the classic genetic algorithm can achieve good convergence performance and optimization effects for pile arrangement problems,and meet the feasibility and practicality requirements of engineering design,providing a reliable solution for the optimization of pile arrangement for mooring dolphin.