The finite element software Abaqus is used to carry out numerical calculation on the lateral bearing capacity of the fixed four-pile foundation of offshore wind turbine. Three dimensional finite element method and p-y curve method are used to analyze the displacement response of simple uniform pile, and the accuracy of the p-y curve method is verified. The p-y curve method is used to analyze the lateral bearing capacity of the four-pile foundation with a pile diameter of 3.2 m, which is compared with that of the single-pile foundation with a diameter of 8.0 m. The result shows that the lateral bearing capacity of the four-pile foundation with a diameter of 3.2 m is obviously more excellent than that of the single-pile foundation with a pile diameter of 8.0 m. The research provides a reference for the rapid calculation of the lateral bearing capacity of pile foundations by p-y curve method in the future.