Movable pulley device for rope returning suspension of hanging scaffold

The utility model provides a movable pulley device for rope returning suspension of a hanging scaffold. The movable pulley device comprises a pulley mounting box fixed at the top of the hanging scaffold and a movable pulley block mounted in the pulley mounting box, wherein a rope inlet hole and a rope outlet hole are respectively formed in the top of the pulley mounting box; a suspension rope lowered along the vertical shaft enters the pulley mounting box through the rope inlet hole and is connected with the movable pulley block in a matched manner; the suspension rope passing through the movable pulley block upwards penetrates out of the pulley mounting box through the rope outlet hole and is connected with a shaft mouth beam; meanwhile, a ventilation branch pipe is further connected to the interior of the pulley installation box and connected with a main ventilation pipe in the vertical shaft. The movable pulley block is mounted at the top of the hanging scaffold through the pulley mounting box, and positiv