Passage systems of rift basins are linkage between source rock and trap, and unification between static factors and dynamic factors of forming reservoir. Passage systems can be classified into fracture type, sand body type, unconformity type, and compound type by composition, into effective passage system, and high-effective passage system by validity; and into passage system, and subtle passage system by identification. The spatial distribution of passage system controls the meshy distribution of oil-gas reservoir. Space-time effectiveness of passage system controls oil-gas migration and accumulation. Subtle passage systems control reservoir-forming of lithological trap in subsag belts. Careful study and reservoir-controlling theory of passage system in the rift basins have important value in theory and application for expanding exploration space and seeking remaining reservoir.