The invention relates to a universal gas sampling connector which comprises a connecting pipe connector, a transition pipe and sampling pipes. One end of the connecting pipe connector is communicated with a gas sampling pipe. The other end of the connecting pipe connector is communicated with the output end of the transition pipe. The input end of the transition pipe is provided with a plurality of ports of different calibers. Each port is connected with the corresponding sampling pipe. By converting an existing gas sampling connector into the universal SF6 gas sampling connector, the sampling connector installing time and the sampling connector replacing time are omitted, and the work efficiency is greatly improved.