The main logistics theories in the field of logistics theory included: 1. supply chain theory: supply chain refers to the entire logistics process from the purchase of raw materials to the delivery of products. This theory believes that logistics activities are an important part of the supply chain, and the efficiency and reliability of the supply chain can be improved through the optimization of logistics processes. Operations research: Operations research is a subject that uses mathematics and computer science to optimize logistics processes and resource allocation. It mainly studies how to improve logistics efficiency and reduce costs through planning, decision-making, and control methods. Logistics psychology: Logistics psychology refers to the study of human behavior and psychological changes in the logistics process. It mainly studies the psychological basis, influencing factors and optimization methods of people's logistics behavior, which helps to improve the humanization and reliability of the logistics process. 4. Logistics Information System: Logistics Information System refers to the discipline of managing logistics processes through information technology. It mainly studies how to establish, manage, and maintain logistics information systems to improve logistics efficiency and reduce costs. 5 environmental economics: environmental economics refers to the study of the impact of environmental factors on the logistics process and optimization methods. It mainly studies how to improve logistics efficiency and environmental protection through environmental protection and sustainable development.