The utility model discloses a portable sulfur hexafluoride AUTOMATICALLY SUPPLY AIR device, it contains the inflating pipeline who is used for the tonifying qi, and inflating pipeline's one end is forbeing used for the pressure connection that connects with the gas cylinder, and inflating pipeline's the other end is for being used for the gas -charging connection connected with sulfur hexafluoride equipment, inflating pipeline is last to establish ties in proper order to have and is used for controlling gas filled solenoid valve I and solenoid valve II, still contain and just control carminative solenoid valve III and solenoid valve IV with II parallelly connected being used for of solenoid valve I and solenoid valve respectively through exhaust pipe with the inflating pipeline intercommunication, the last front end that lies in solenoid valve I of inflating pipeline is provided with air inlet pressure sensor, and the last rear end that lies in solenoid valve II of inflating pipelineis provided with inflation inlet pressure sensor and temperature sensor, still contain the shell that is used for setting up inflating pipeline, solenoid valve, pressure sensor and temperature sensor,inside circuit board and the chargeable call of being provided with of shell.