The utility model provides a high automatic escalator of airport vehicular liftable, escalator truss is the telescopic structure, divide into on the staircase truss under truss and the staircase, is linked to each other by flexible truss and flexible pneumatic cylinder between the truss under truss and the staircase on the staircase, all with being equipped with the opinion tight pulley on step guide rail and the staircase drag chain of suit in escalator truss, advocate that the tight pulley setting is on advocating the tight pulley guide rail, install time take -up pulley on the handrail area equally additional, inferior take -up pulley setting can be followed time take -up pulley guide rail and slide on inferior take -up pulley guide rail. The utility model discloses a high automatic escalator of airport vehicular liftable, because escalator truss is the telescopic structure, length can be adjusted, simultaneously, step guide rail, staircase drag chain and handrail area change moving trajectory along with the altitude variation of staircase under the effect of take -up pulley, consequently, under the condition that does not change the staircase slope, can adjust the height of staircase for a staircase equipment can be applicable to the not model of equidimension specification, and application scope becomes wide.