When the building is on fire, people living in high-rise cannot take the elevator or quickly go down the stairs.The product is usually an ordinary balcony railing, and one side of the railing is a rotating shaft inclined downward 45 °. When a fire is encountered, as long as the emergency button on the other side is pressed, the switch pops open, and the railing is pushed outward. The railing folds and rotates along the axis, turning into a escape ladder that continues down to the ground. People trapped can climb down the Turn over the escape ladder and reach the ground safely and quickly.