The paper is establishing a model of wind blade by Reverse Engineering(RE), which can obtain the fitting surfaces of complex structure. In order to investigate the mechanical behaviors of blade with circular hole, the digital model is applied to the finite element calculation. Then the static loading tests are carried out to obtain strains at different positions of surfaces by Fiber Bragg Grating sensors. By comparing the finite element simulation value with the experimental value, it is verified that the finite element modeling based on Reverse Engineering is suitable.