Butt joint device for assembly type steel structure

The utility model discloses a butt joint device for an assembly type steel structure, and particularly relates to the technical field of steel structures, the butt joint device comprises two fastening sleeves, two sides of the two fastening sleeves are fixedly connected with side plates, a connecting assembly is arranged among the four side plates, and the connecting assembly comprises two first lead screws, four threaded sleeves and four gaskets. One ends of the two first lead screws penetrate through the four side plates correspondingly, the four threaded sleeves and the four gaskets are movably arranged on the two first lead screws in a sleeving mode correspondingly, the four gaskets make contact with the four side plates correspondingly, one sides of the four side plates are fixedly connected with inserting rods correspondingly, and the four inserting rods penetrate through the four side plates correspondingly. The first lead screw is inserted into the two side plates, then the two threaded sleeves are se