ed the contour of the image into polygon path by using the vertices in the bitmap, then optimized the path by using Bezier curve according to the polygon Angle, and finally optimized the final path by the cross entropy loss function.The experimental results show that the vectorized line transition of the algorithm on complex edges is better than other algorithms, and the time complexity of the algorithm is lower than taht of the current common vectorized algorithm, and the running time of the algorithm can be improved by more than 40% compared with other algorithms.For the Potrace method, a new loss function optimization algorithm is proposed, which is better than other algorithms in the transition of complex edges. Besides, the running time of the algorithm is greatly reduced, which is beneficial to the research of the reverse design method of cultural and creative products.