Aeronautical blades are complex profiled surfaces. As one of the essentialparts of aeroengine, highprecision shape and structure detection is indispensable. Due to the complexedge curvature of complex profiled surfaces, the current point cloud registration technology can not satisfy the highprecision registration requirements. The highprecision registration technology is neededforaeroengine blade complex profiled surfaces detection. Thus, a new registration algorithm based on multiscale descriptor is proposed, which combines multiscale features with spatial angle difference threshold filtering algorithm to achieve highprecision registration of specialshaped surfaces. This method can effectively reduce mismatching points and noise points. Experimental results show that the registration algorithm has high registration accuracy and good robustnessfor complex profile surfaces of aeronautical blades.