Railway accessories are the components of railway lines. The tracks referred to here include steel rails, sleepers, connecting parts, ballast beds, anti-climbing equipment, rail supports and turnouts. As an integral engineering structure, the track is laid on the roadbed, which plays a guiding role in the operation of the train, and directly bears the huge pressure of the rolling stock and its load. Under the power of the train's operation, its various components must have sufficient strength and stability to ensure the safe, stable and uninterrupted operation of the train according to the specified maximum speed.