Seamless steel tube with high sealing performance in assembly

The utility model relates to the technical field of seamless steel tubes, in particular to an assembled seamless steel tube with high sealing performance, which comprises a tube body, a positioning groove is arranged at a port of the rear side of the tube body, a positioning block is arranged at a position, corresponding to the positioning groove, of a port of the front portion of the next tube body, and the positioning block is connected with the positioning groove in a clamping mode. An L-shaped mounting block is arranged at the top end of the rear side of the pipe body, a butt joint groove is formed in the center of the rear side of the top of the mounting block, a butt joint block is arranged at the position, corresponding to the butt joint groove, of the top end of the next section of the pipe body, the butt joint block is connected with the butt joint groove in a clamped mode, and a threaded hole extending to the inner side of the butt joint block is formed in the outer side of the mounting block. Fixin