Abstract: In order to ensure the safe operation of trains, the signal system was developed gradually to the main locomotive signal. The ground transmitting equipment in the Locomotive Signal System was an important part of the whole protection system. For the correct integrity of locomotive signal in detection station, it was very important to ensure the reliable work of ground code equipment and shorten the fault delay of code. The paper summarized the daily accumulated experience, discussed the failure treatment method for ZPW-2000A two-wire system overlapped code ground equipment, proposed the solution to reduce the occurrence of the fault and shorten the delay of fault processing.