The invention provides a monitoring method for a locomotive storage battery. State parameters of each storage battery in a locomotive storage battery pack are acquired in real time and state parameters of the locomotive storage battery pack are acquired in real time through setting a monitoring system for the locomotive storage battery pack; the monitored state parameters of each storage battery and the monitored state parameters of the storage battery pack are fed back to a driver and an operation department; analysis judgment is carried out on the state parameters of each storage battery andthe state parameters of the storage battery pack. According to the monitoring method for the locomotive storage battery, provided by the invention, each state parameter of the storage battery is monitored in real time and the state of the storage battery is fed back to the driver and the operation department in time, so that the driver and operators of the operation department can accurately operate in time according to conditions of the storage battery, failure and casual repair, caused by the storage battery, of the operation department are reduced and the locomotive operation cost is reduced.