The first-line driving unit responsible for the operation, comprehensive maintenance and comprehensive maintenance of railway locomotives. Railway locomotive depot is the main traffic department of railway transportation system, which is mainly responsible for the first-line traffic unit of railway locomotive operation, comprehensive servicing and overall maintenance. The locomotive depot is generally located near an important railway hub city or an important freight marshalling station, and is mainly responsible for the power traction task or special transportation task of passenger trains, cargo trains and baggage trains. Railway transportation is a land transportation mode, in which locomotives are used to pull trains and vehicles on two parallel rails.