Abstract: Currently, in the face of increasing transportation pressure in urban logistics distribution systems and the growing surplus of transportation resources in the public transportation industry, This paper explores the feasibility of the public transportation collaborative express delivery logistics system, analyzes the conditions required for the system, and designs the system in detail. It also conducts a case study using the public transportation network of Lanzhou City and the logistics stations in Lanzhou City. The public transportation collaborative express delivery logistics system combines the existing express delivery logistics with the public transportation network. Through deep integration, it can achieve a “public transportation + express delivery” logistics model, thereby expanding new directions for logistics transportation.