The invention provides a multi-functional toilet wastewater collector control device for a railway train, which is arranged near a train toilet wastewater collector, and comprises a base, an upper cover, and a circuit board, wherein the inner side of the upper cover is fixed with a light-emitting diode display board and a voltmeter, the outer side of the base is provided with an aerial socket and a reset pushbutton, an input port of a singlechip on the circuit board is connected with a liquid level switch, a pressure switch and a pushbutton of the train toilet wastewater collector through aviation plugs and external cables, and acquires signals output by the liquid level switch, the pressure switch and the pushbutton, and an output port of the singlechip is connected with related valves of the train toilet wastewater collector and a power cord through a driver, a relay and the aviation plugs respectively. The effects of the device are to ensure that all control devices of the train toilet wastewater collector are integrated, miniaturized and intelligentized and have the display function of displaying the state of various switches, pushbuttons and electromagnetic valves and a diagnostic function at the same time, so the control device can greatly reduce the manufacturing cost for toilet wastewater collectors, improve the serviceability rate and the reliability of the toilet wastewater collectors, and save overhaul man-hours, maintenance cost and operation cost.