High speed rail refers to high-speed rail trains designed for speeds of 250-380 kilometers per hour. The signal system consists of a centralized control system (CTC), a train control system (CTCS-3 level), a station interlocking system (CBI), a centralized signal monitoring system (CSM), a power supply system, etc. It is a key equipment to ensure the safety of high-speed railway operation and improve transportation efficiency.

With the rapid development of railway transportation in our country, the running speed of trains continues to increase and the density continues to increase, which puts higher demands on the reliability and safety of high-speed railway communication signal systems.