At present, domestic cities are carrying out or have been carrying out research on resource sharing, in which vehicle depot resource sharing is an important part of the resource sharing of a rail transit network. According to the Code for the Design of the Metro, vehicle base design shall include a depot (parking lot), comprehensive maintenance center, main storehouse, training center, and other ancillary facilities for production, living, and offices. However, there are still some deficiencies in the research of resource sharing. A system-wide resource sharing research is lacking as it focuses only on resource sharing of overhauls, and does not examine a vehicle base comprehensive maintenance center and material storage. This paper innovatively puts forward the research idea of vehicle depot resource sharing based on the goal of life-cycle cost control of a line network. Taking Shenyang Metro line network vehicle depots as an example, the resource sharing scheme is proposed. Further research on material storage, comprehensive maintenance, special vehicles, and other aspects of resource sharing are studied. Some standardized indicators for the allocation of each unit of the vehicle depot is also put forward. After completely the Metro construction experience, the operation experience of other cities, and the construction scale of vehicle depots in different cities are investigated, research conclusions are finally obtained. This research will be helpful in guiding Shenyang Metro to allocate more reasonable material, workforce, equipment, and land for a vehicle base in the new round of construction planning and future network planning adjustments. ?