The invention provides an automatic control method for locomotive traction converter breakdowns. After a main converter breakdown occurs in the locomotive running process, a drive control unit (DCU) can rapidly identify and control the occurred breakdown, firstly it is ensured that breakdown resetting is conducted in a safe and reliable environment after the breakdown occurs, and the consequence of further enlargement of the breakdown brought by the blindness of artificial resetting operation is avoided; and secondly, effective analysis is conducted by the DCU according to the influences of occurrence of the breakdown to a traction converter, removing treatment is conducted on the breakdown in a pointed mode, so that the influences of the occurred breakdown to continuous operation of the traction converter are minimized, and therefore the locomotive availability can be greatly improved. According to the automatic control method for the locomotive traction converter breakdowns, the process can be automatically achieved all the way through software, and artificial participation is not needed.