Abstract: A new problem about the supply chain resource integration and optimization in mass customization (MC) by the fourth party logistics (4PL) is analyzed in this study. On this basis, a dynamic and multi-objective optimization model and an algorithm are set up for the decision optimization of the supply chain resource integration in mass customization by 4PL. The optimization model and the algorithm can not only reflect the operating requirements for the special resource integration process in mass customization but also reflect the thought of solving the key contradiction in mass customization and give consideration to the characters of 4PL operation in the supply chain. The application feasibility of the model and algorithm are also pointed out in this study.