The utility model discloses a hoisting device for an insulator chain, which comprises a hoop assembly and a hoisting assembly, the hoop assembly comprises two hoop semi-rings, each hoop semi-ring comprises a hoop section and a connecting lug, the two connecting lugs on the same side of the two hoop semi-rings are rotatably connected, and the two connecting lugs on the other side of the two hoop semi-rings are detachably connected through a clamping structure; each clamping structure comprises an embedding groove formed in the inner side of the corresponding connecting lug; clamping grooves areformed in two opposite groove walls in the embedding groove; a first expansion piece is arranged on the other connecting lug; the first telescopic device is connected with a clamping sleeve through aplurality of telescopic rods, the clamping sleeve is of a groove structure, two symmetrically-arranged wedge-shaped clamping blocks are clamped in the groove structure of the clamping sleeve in a sliding mode, the two wedge-shaped clamping blocks are connected through an elastic reset piece, the wedge faces of the two wedge-shaped clamping blocks are oppositely arranged, and sliding through holesare formed in the two oppositely-arranged side walls in the clamping sleeve; compared with the prior art, the insulator chain fixing device can be quickly and fixedly installed on an insulator chain,and the fixing firmness is high.