Self-adaptive fixing device for cable measurement

The utility model discloses a self-adaptive fixing device for cable measurement. The self-adaptive fixing device comprises an integral shell, a first lining piece and a plurality of second lining pieces, the whole shell, the first lining piece and the second lining piece are of hollow structures with the two ends open, and a channel allowing a cable to penetrate through is jointly formed. The whole shell is composed of a first shell body and a second shell body, and the first shell body and the second shell body can be fixed or separated through a thread structure. The size of the first lining part is matched with the internal space of the whole shell, so that the first lining part can be stably accommodated in the whole shell when the first shell and the second shell are tightened; the second lining parts are sequentially nested from inside to outside and integrally arranged on the inner side of the first lining part, and the outer diameter of the second lining part on the outermost side is matched with the