The invention discloses a W-shaped elastic strip parametric modeling method which comprises the following steps: A, acquiring design parameters in a front view and an expanded view of an elastic strip; B, calculating an elastic strip front view curvilinear equation and an elastic strip expansion graph curvilinear equation; C, based on the symmetrical structure of the elastic strip, obtaining an elastic strip overall axis space curve equation;C, compiling a parameterized modeling program by utilizing Matlab software, wherein the parameterized modeling program has the function of quickly obtaining an elastic strip axis space curve equation based on elastic strip design parameters; and E, inputting the diameter D of the elastic strip, and finishing modeling by utilizing finite element software. The method has the beneficial effects that the elastic strip axis space curve equation can be obtained through a parameterized modeling program only by acquiring basic parameters of the elastic strip structure, namely, the formula, and the precision, and the corresponding finite element model can be quickly and accurately established by utilizing finite element software on the basis of the equation and the diameter D of the elastic strip.