The invention discloses an equivalent method of a self-elevating platform triangular truss framed leg, which comprises the following steps: firstly, measuring or designing the parameters in the triangular truss framed leg, wherein D i is the diameter of the ith member; l i is the length of the member i; s is the spacing of the lateral braces; Beta i is the dip angle between the member and the horizontal plane; Alpha i is the included angle between the member shaft projecting to the horizontal plane and the flow direction; CD i is the drag force coefficient of a single member; Theta is the wind incident angle; W is the horizontal distance between the rack root of a single chord member and the end of the other end of the rack; CD 0 is the drag force coefficient of a tube member, and the value is 0.5; CD 1 is the drag force coefficient when the flow direction corresponding to the projection diameter W is vertical to the rack. According to the equivalent method of the self-elevating platform triangular truss framed leg provided by the invention, the value of K in the equivalence theory equation CD*D=K can be directly determined through the above parameters, so that the triangular truss framed leg can be equivalent to the cylindrical leg, so as to achieve the aim of simplifying the building of a wind model and the calculation of the leg wind load in the intact stability and damaged stability analysis of the self-elevating platform.