The utility model relates to a two telescopic end devices of lifting is applicable to to combine and adopts working face hag board, the limited hydraulic support two telescopic end devices of lifting of design space height. Including lift end jack and with lift the roof -rack of being connected on end jack upper portion, the roof -rack is connected with hydraulic support's base, lift and be equipped with the push rod below the end jack, it is two telescopic jack to lift end jack. Under the same or close condition of end device stroke requirement is lifted to the tradition, has only 23 of traditional device appearance length, under the same or close condition of end device overall dimension requirement was lifted to the tradition, it was nearly 2 times that end device is lifted to the tradition to stretch scaling, made the adaptation hag board working face that the support can be better raise the base, try to stop people from fighting each other, adopt the utility model discloses, make its under hag board operating condition, the design space height is limited and require to raise under the long circumstances of stroke, makes the adaptation hag board working face that the support can be better and raises the base, tries to stop people from fighting each other, avoided lifting the end circumstances appearing pricking highly inadequately.