Abstract: The optimal estimation of the cutting plan for custom-made garments is founded out by differetiation and Lagrange multipliers.After sorting and incorporation,the articles with all desirable specifications are equally numbered,that make the total amount of fabric needed minimal.The optimal cutting plan of custom-made garments is theoretically summed up,and all indexes are verified by operations at the mill level.It demonstrates that the optimal cutting plan for custom-made garments is feasible.