Took the maintenance support service model for Beijing subway line 4 as an example, urban rail transit operation managements relied on the vehicle manufacturing cooperation was elaborated which had the unique management, technology, resources and a sound system of repair, maintenance and operations security for achieving the vehicle maximize value within the whole life-cycle. The concept, model and process of extension service model for metro were introduced. The subway extension service model is another living power to promote diversified development of the subway maintenance support market, and it has a great significance to the newly arisen subway market.