Guide self-maintaining time delay safe switch

The invention relates to a guide self-maintaining time delay safe switch, which consists of a duplex switch (1), a time delay switch circuit (2) and a double-coil common-core double-contact electromagnetic type logic control relay (3), wherein the duplex switch (1) consists of switches K01 and K02, the two switches are controlled by the same action and are synchronously switched on or switched off, the time delay switch circuit (2) consists of a field effect tube V-groove metal oxide semiconductor (VMOS), a time delay capacitor C, a reverse diode D and a maintaining resistor R, the double-coil common-core double-contact electromagnetic type logic control relay (3) consists of an iron core, suction coils L1 and L2 and contact switches K11 and K12, the suction coils L1 and L2 are concentrically sheathed and wound or parallelly wound on the iron core, and the contact switches K11 and K12 are simultaneously and synchronously controlled. The basic function of the time delay turn-off of a main circuit is realized,