Buffering type prestressed concrete fold-line-shaped roof truss device

The utility model relates to the technical field of house frameworks, in particular to a buffering type prestressed concrete fold-line-shaped roof truss which comprises a top frame, supporting columns, cross beams and oblique beams, the supporting columns slide on the top frame in the vertical direction, and the upward ends of the supporting columns are connected with the cross beams; one end of the oblique beam is rotationally connected with the cross beam, the oblique beam is rotationally connected with a frame, parallel to the long edge of the cross beam, on the top frame through a connecting piece, the rotating axis of the connecting piece and the top frame is parallel to the rotating axis of the oblique beam and the cross beam and perpendicular to the long edge direction of the oblique beam, and the connecting piece slides on the oblique beam in the long edge direction of the oblique beam; a plurality of oblique beams are arranged on the two sides of the cross beam in the long edge direction respectively