Seat framework pipe convenient to assemble

The utility model discloses a seat framework pipe convenient to assemble, which comprises a pipe body and a lining pipe, a connecting plate extends out of the front end part of the pipe body, positioning blocks are welded on the inner walls of the end parts of the connecting plate, fixing bolts penetrate through the middle parts of the positioning blocks and the inner parts of the end parts of the connecting plate, the lining pipe is fixed in the rear end of the pipe body, and the lining pipe is fixed in the pipe body. Insertion openings are evenly formed in the outer wall of the lining pipe, and nuts are arranged in the middles of the inner bottom faces of the insertion openings. According to the seat framework pipe convenient to assemble and disassemble, the fixing bolt can independently rotate in the connecting plate and the positioning block to move up and down, the fixing bolt cannot be separated from the connecting plate and the positioning block in the downward moving process, the locking and fixing ef