Auxiliary device convenient to fix and used for butt joint of thermocouple compensation cable

The invention relates to the technical field of cable butt joint, in particular to a thermocouple compensation cable butt joint auxiliary device convenient to fix and a use method of the thermocouple compensation cable butt joint auxiliary device. A thermocouple compensation cable butt joint auxiliary device convenient to fix comprises a bottom plate, a first supporting rod is fixedly connected to the middle of the front side of the upper end face of the bottom plate, a first gear ring is fixedly connected to the upper end of the first supporting rod, and a second supporting rod is fixedly connected to the middle of the front side of the upper end face of the bottom plate. The end, away from the fifth connecting rod, of the sixth connecting rod is rotationally connected with an L-shaped plate through a pin shaft, the L-shaped plate is rotationally connected with a blade through a pin shaft, the middle of the front end face of the blade is fixedly connected with a fixing disc, the left and right ends of the fr