The pile position of pile group foundation in offshore wharf is densely arranged，so the pile sinking construction is greatly affected by environmental factors，the positioning is prone to deviation，and there is a certain risk of pile collision. In the design process，it is often necessary to check the distance between piles to reserve the working space for pile driving. The pile spacing calculation methods used in the past have certain limitations，and cannot quickly and accurately calculate the shortest space spacing and the generation position in the pile foundation，which brings difficulties to the calculation of the pile body spacing. Through the analytical geometry method，two sets of mathematical models，the ergodic method and the linear box constraint method，are developed，which can quickly calculate the shortest distance between two piles and the position where the shortest distance occurs according to the design pile parameters. To ensure the safety of the pile body during the pile driving process，these pile spacing algorithms are used to calculate the pile group foundation with various types of piles，and the results are accurate and the application effect is good.