Connecting device for fabricated building structure

The utility model relates to the technical field of fabricated building structures, in particular to a connecting device for fabricated building structures, which comprises a fixing rod body, a locking ring is fixedly mounted at the top end of the fixing rod body, an external thread groove is arranged on the outer side of the locking ring, and a telescopic rod is movably connected to the inner side of the fixing rod body. The outer side of the fixing rod body is connected with a locking bolt through an internal thread groove, the inner side of the first groove hole and the inner side of the second groove hole are both connected with fixing bolts, a first limiting groove is formed in the side, close to the first groove hole, of the outer side of the fixing rod body, and a second limiting groove is formed in the side, close to the second groove hole, of the outer side of the telescopic rod. According to the fixing device, the fixing rod main body, the locking ring, the external thread groove, the telescopic rod