The invention discloses a water feeding control system of a train. The water feeding control system comprises a water feeding solenoid valve, a pipe receiving device, a water supplying pipe and a water feeding pipe, wherein the water feeding solenoid valve is connected to the water supplying pipe and the water supplying pipe is contained in the pipe receiving device; the water feeding control system further comprises a displacement sensor, a pressure or flow sensor, a unidirectional water feeding connector and a self-control device; an input port of the self control device is connected with signal output ports of the displacement sensor and the pressure or flow sensor; and an output port of the self-control device is connected with the water feeding solenoid valve and controls the water feeding solenoid valve to be opened or closed according to an input port signal. According to the water feeding control system of the train, the problems that a plurality of times of operation and setting need to be carried out on water feeding equipment in a water feeding process of the train and the operation efficiency is low are solved. A water feeding operation process of water feeding operators is simplified; the efficient water feeding operation is guaranteed, the operation cost is reduced and the production efficiency is improved; and meanwhile, the waste of a water resource is prevented.