The utility model provides a gathering and transportation pry device for gas injection-production of a salt-cavern gas storage and belongs to the technical field of the gas injection-production of a well site. A horizontal gravity type separator is connected with one ends of a first electric ball valve, a plug valve, a manual ball valve and a relief valve; the other end of the first electric ball valve is connected with one end of an angle throttle valve; the other end of the angle throttle valve is connected with one end of a second electric ball valve; the other end of the second electric ball valve is connected with the wellhead; the other end of the manual ball valve is connected with one ends of an axial flow check valve and an ultrasonic flowmeter; the other end of the axial flow check valve is connected with one end of a third electric ball valve; the other end of the third electric ball valve is connected with the wellhead; a vent valve is connected with one ends of an instrumental joint and a fourth electric ball valve; the other end of the fourth electric ball valve is connected with one end of the methanol injection opening; the other end of the methanol injection opening is connected with the other end of the ultrasonic flowmeter; the other end of the plug valve is connected with an atmospheric pollution tank; a methanol dosing device is connected with the methanol injection opening. The gathering and transportation pry device for the gas injection-production of the salt-cavern gas storage can improve the injection-production efficiency of underground gas storages and improve the safety and reliability of gas storage equipment.