Sea ice is one of the primary loads faced by offshore jacket structures in the Bohai Sea. Accurately assessing the extreme static ice forces on these structures remains challenging, and measuring ice forces on prototype structures is a crucial method for studying ice loads. This paper investigates an indirect method for measuring ice forces based on fibre optic strain measurements. By combining structural numerical simulations, the correlation between strain measurement points on the platform structure and ice forces was established. Fibre optic strain sensors were installed on a platform to measure the static ice forces on the platform in the Bohai Sea. The feasibility of the measurement system was validated by comparing it with theoretical calculation models. The research results provide a reference for the indirect measurement of ice force of platforms in ice regions.