Connecting tool of three-way valve for liquefied gas

The utility model belongs to the technical field of three-way valves, and discloses a connecting tool of a three-way valve for liquefied gas, which comprises a three-way valve shell, a rotating handle is rotatably connected to the top of the three-way valve shell, a primary output pipe is arranged on one side of the three-way valve shell, and a secondary output pipe is arranged at one end, far away from the primary output pipe, of the three-way valve shell. An output bottom pipe and a linkage assembly are arranged at the bottom end of the three-way valve shell, the three-way valve shell is installed on one side of the first-stage output pipe, the linkage assembly comprises a linkage ring, and the outer wall of the end of the first-stage output pipe is sleeved with the linkage ring; the linkage assembly is used for connecting the three-way valve and an external pipeline, the external hollow pipe can be installed only by aligning the external hollow pipe to one side of the first-stage output pipe and enabling t