Abstract: Storage tank will be affected by wind load besides the action of dead weight and internal hydraulic pressure, which will generate a stress in storage tank and over stress will lead to its damage. The article puts forward a displacing finite element method for cylindrical storage tank analysis under wind load action. According to its structure feature that cylindrical storage tank belongs to axial symmetry casing body, discrete it to cylindrical casing unit and annular casing unit > with nodal point circle connected between each unit, wind load and displacement will spread along the circle into a trigonometric series, thus reduces calculating dimension, working load and time. It is shown with an arithmetic example calculated with a programmed finite element analysis program, the method can be used to calculate a stress on cylindrical storage tanks conveniently and effectively. It provides a theoretical basis for design of cylindrical storage tanks.