As the blades of wind turbines tend to be longer and thinner, the demand for their bending strength is increasing day by day. Inspired by the regular distribution of bamboo node and the node diaphragms supporting the culm, a shear web is proposed to be added inside the blade in this paper. A forced blade model with ring shear webs is set up,and then a numerical simulation is performed on one 750 kW wind turbine by MATLAB software. Subsequently, the changing trends of the inertia moment I_y, the maximum stress σ_max and the relative thickness reductionΔD, respectively, along with the ratio ε of the inner chord length to the outer one and the blade span x are gained. It is concluded that the bending strength around the blade root increases greatly. It also indicates that the bending strength of blades with ring shear webs is almost the same as the ones with solid shear webs when the ratio ε is set as 0.4. Moreover, the use of ring shear webs contributes to lighter blades.