The invention discloses a train supply control device. The train power supply control device comprises a main circuit unit and a control unit; the main circuit unit comprises a first power supply loop used for converting single-phase alternating current input into direct current voltage output through rectification and filtration, and the single-phase alternating current input end is provided with at least two vacuum contactors (KM1, KM2) which are connected in parallel; the control unit comprises a first control subsystem, at least two independent driving circuits are arranged in the first control subsystem to drive and control the vacuum contactors respectively, and therefore one or another vacuum contactor can be preferably switched and used based on the preset conditions in normal operation. According to the train power supply control device, after the mode of arranging a single vacuum contactor is changed into the mode that two vacuum contactors are connected in parallel, the phenomenon that a train power supply system stops working caused by contactor failures can be effectively reduced, the reliability of the overall system is further improved, and therefore the comfortable degree of a passenger train is improved.