The invention relates to the technical field of a relay, and in particular to a three-pin reed switch type double-circuit trip node gas relay which is applicable for a gas relay on electrical apparatuses such as an operating transformer or a tapping switch. The gas relay comprises a reed switch and a floater, a heavy gas protection device and a slight gas protection device are arranged in a shell of the gas relay, transformer oil is arranged in an oil pipeline in the shell, and a side inlet is arranged on the shell. On the basis of the conventional gas relay, a contact type reed switch with three metal reeds is used as a signal output node, an alarm or trip signal sent by mistake due to poor insulation outside pins can be effectively prevented, outside interference is reduced, protection reliability is enhanced, and a fault due to oil leakage of the transformer or a fault inside the transformer can be rapidly distinguished. The three-pin reed switch type double-circuit trip node gas relay has the characteristics of high insulativity of a secondary circuit, and safe and reliable use; the three-pin reed switch type double-circuit trip node gas relay is capable of avoiding false operation of the contact, is simple and reasonable in structure, obvious in effect, and is beneficial to promotion and application.