It is required high-quality rail welded joint on passenger dedicated line and its appearance quality should be better than that on normal speed line. The joint quality depends on the factors of rail, welding method, operator's quality and management of welding. This paper makes a comparison of the quality of rail joints welded by different methods, proposes that the movable flashed welded rail should be adopted on passenger dedicated line, and presents the allocation of reference operation position and procedure for welding long specified-length rail on site.