The utility model belongs to the electric power construction utensil, in particular to cross obstacle coaster, be equipped with connecting bolt hole (1 on U -shaped hanger (1) 1 ), connecting piece (2) upper end is worn the dress and is fixed on U -shaped hanger (1) and with nut (12) locking, be connected with connecting bolt (10) and nut (12) between connecting piece (2) and the anchor clamps (3), (8) the upper end of sealing up a door is connected with fold paper (9) in anchor clamps (3), one suit spacer (11) is gone up in connecting bolt (10) of sealing up a door between (8) and anchor clamps (3), anchor clamps (3) between connecting piece (2) and spacer (11) and seal up a door and be equipped with mount main shaft (7) between (8), a sub - pulley fixed frame of circular shape (4) is worn to adorn in mount main shaft (7) activity of going up, sub - pulley fixed frame (4) are gone up to fix along the circumference equipartition and are equipped with a plurality of sub - pulley spindle (5), cross obstacle coaster simple structure, high durability and convenient use, safety becomes when making the barrier through sub - pulley, smoothly, during operation labour saving and time saving, and a work efficiency is increased.