To study vertical steel storage tank isolation design and analysis methods,three-stage design method is used as the optimal design of base isolated for the vertical steel storage tank.In the first stage,from rigidity theory,the wave height amplification effect caused by the base isolated is considered firstly,and the wave amplification is limited to the boundaries of isolation design to adjust the frequency.In the second stage,from elasticity theory,the base shear of isolation is analyzed,and the damping effect of the base isolated is studied.In the third stage,the square and square root results of the base shear obtained by the rigid theory and the theory of elasticity are used as a design basis.In theory,the only guarantee the effect of the two effects,but also for engineering design and analysis provides a easy to understand method of analysis.The results showed that this approach to design can not only achieve the right base shear reduction,but also be capable of controlling the amplification effect of wave height.