Abstract: A simple and efficient algorithm for recognizing and suppressing feature-intersected blends is proposed.This is mainly achieved by analyzing the existing status of sharp edges before and after blend removal,from which the model topology can be anticipated.Sharp edges on a blend are classified into deleted edges,reserved edges and split edges.Blends with reserved edges are recognized as the feature-intersected.Furthermore,the sharp edge classification also indicates the model's topology change,and the final simplification model can then be reconstructed by modifying the boundaries of the faces adjacent to the blends.Experimental results on practical engineering models are also shown to demonstrate the algorithm's robustness and efficiency.