Abstract: The equilibrium of passenger flow between stations within Transit-Oriented Development (TOD) corridors is pivotal to their operational performance, and the connection between various stations in the corridor assumes a decisive role. With Origin-Destination data of rail transit of Shanghai City, community detection algorithm is applied to identify closely connected station communities, then delineating the spatial range of each TOD corridor. The corridors are divided into radial, orthogonal, and curved types. Profile Equilibrium Index and Directional Equilibrium Index are constructed to measure the equilibrium levels of passenger load distribution, which reveal significant differences among corridors. A two-dimensional categorization of TOD corridors is conducted, forming four types as dual-equilibrium, directional-equilibrium, profile-equilibrium, and dual-disequilibrium. It is found that dual-equilibrium corridors are characterized by polycentric and mixed land use, while dual-disequilibrium ones are characterized by a string of suburban residential areas. 5D principles for TOD corridor as a spatial unit are proposed from the perspective of passenger flow equilibrium. With the method of corridor division and its passenger flow equilibrium evaluation, an integrated technical framework for Corridor-TOD with spatial optimization and Station-TOD synergies can be provided.