Split assembly type prefabricated cover beam

The invention provides a split assembly type prefabricated cover beam. The split assembly type prefabricated cover beam comprises prestressed steel bars. The multiple cross beams are installed at the top ends of the stand columns, and the prefabricated slabs are installed on the surfaces of the cross beams; the multiple first sleeves are installed in the cross beam, and the first splicing steel bars are in sliding connection with the first sleeves; the top end of the cross beam is fixedly connected with a plurality of second splicing steel bars, and the second splicing steel bars and the first splicing steel bars are in sliding connection with a second sleeve; the top ends of the second sleeves are fixedly connected with the fixing steel bars, the fixing pipes are fixed to the bottom ends of the second sleeves, and the adjacent second sleeves are communicated through the fixing pipes. An exhaust mechanism; a reinforcing mechanism; and a sealing mechanism. The split assembly type prefabricated cover beam has t