Abstract: Minimal jacket platform refers to the offshore oil and gas production platform with simple structure, light weight and less topside facilities. In order to design and select platform structure better, a minimal jacket platform with a single-leg three-post structure type was designed in this paper. Option one uses the independent leg type, and option two uses the main column as the leg type. The structural design, comparison and selection research were carried out from three aspects: static force, fatigue and collapse analysis. The analysis results show that the mechanical performance of the jacket with independent leg type is better, which provides reference for the design of this kind of minimal platform in the future.