Taken JZ20-2 jacket offshore platform in Liaodong Bay of Bohai Sea as a model, the vibration reduction measures of the offshore platform with prestressed cables are proposed. The finite element software Abaqus is used to analyze the dynamic time history of the offshore platform under extreme ice load. The displacement and acceleration response of the offshore platform under different ice loads and prestresses are compared and analyzed. The data analysis shows that the prestress is the most important factor affecting the anti-vibration performance of the offshore platform, the prestressed cable can better control the offshore platform under different working conditions, and it is of good damping effect and self-centering performance.