High-building escape device

The invention belongs to the technical field of high-building escape equipment and relates to a down-sliding type box-structure high-building escape device which is fixed on the external side of a building. The high-building escape device mainly structurally comprises a metal rail, an escape box, a control system, a driving system and an energy system, wherein the metal rail is fixed on the external wall side of the high building. After an escape person on the building top enters the escape box, the escape person presses a power supply switch of a driving motor in the control system, then the driving motor in the driving system drives a first support shaft and a second support shaft through a driving chain to enable the escape box to slide down at a constant speed; after the escape person arrives at the bottom of the building safely and escapes, the escape person presses a power supply switch on the side of the box, the driving motor rotates reversely and drives the escape box to lift to the building top, and