The utility model provides a speed controllable high-rise escape device capable of sliding automatically. A load-bearing screw stem is mounted at an opening end of a U-shaped hoisting ring, one side of the U-shaped hoisting ring is welded with a positioning plate with a positioning pin hole, the positioning plate is connected with a control plate via a pin shaft, the control plate is provided with a positioning pin, and the positioning pin is connected with a speed controllable operating rod. The upper portion of the control plate is provided with an inner thread hole connected with a screw stem on a speed controllable ring, and the speed controllable ring is provided with a knurled nut with functions of locking or unlocking the lower half portion of the speed controllable ring. The speed controllable high-rise escape device does not need any power, and controls friction force between a rope and the U-shaped hoisting ring by aid of the speed controllable ring to control sliding speed. In addition, one rope can be shared by persons of identical floors or different floors to escape and transfer objects, thereby greatly increasing high-rise escape speed. In addition, the total speed controllable high-rise escape device is simple and reliable in structure, simple in assembling and disassembling and convenient in use and operation.