The invention discloses a router capable of being turned on in a delayed manner and turned off automatically. The router comprises first to sixth resistors, first to fourth capacitors, first to sixth diodes, a first triode, a second triode, a first potentiometer, a second potentiometer, a bidirectional thyristor and a time-based chip. When the router capable of being turned on in the delayed manner and turned off automatically works and supply voltage fluctuation is raised or lowered, electric potential of emitter electrodes of the first triode and the second triode is raised or lowered; according to different voltage fluctuation conditions, the bidirectional thyristor is cut off, so that the router stops working; after the voltage is normal, the bidirectional thyristor is conducted, so that the router is recovered to normal work.