The invention discloses a cryopump gas film seal composition mainly comprising a movable ring pad (1), a movable ring (2), a movable ring compact sleeve (3), a fixed ring (4), an anti-rotating pin (5), a shaft sleeve (6), a corrugated pipe assembly(7), a gland (8), a turret head bolt (9), a restrictor ring (10), a packing sheet (11), a hexagonal nut (12), a double end stud (13), an inner hexagonal cylinder head screw (14), a wearing sleeve (15), a fixed ring adjusting pad (16), a spring energy storage seal ring (17), a corrugated pipe assembly O-shaped loop (18), and a shaft sleeve O-shaped loop (19). The cryopump gas film seal composition is reasonable and practical in structure design, easy to mount and dismount, timesaving and laborsaving, energy saving environmental protection, safe and reliable, can improve enterprise economy efficiency and economic benefits, and can be widely promoted in applications.