Automatic device for escaping from high building

The invention provides an automatic device for escaping from a high building. The automatic device for escaping from the high building comprises a frame and a sliding mechanism, wherein the sliding mechanism comprises a left gear set and a right gear set, the left gear set is meshed with the right gear set, a rope is arranged between the left gear set and the right gear set, and the rope is in linkage with the left gear set and the right gear set; pinch rollers are arranged outside a gear at the upper end of the right gear set and outside a gear at the lower end of the right gear set respectively and are used for pressing the rope, and pinch roller supporting arms are arranged between the corresponding pinch roller and the gear at the upper end of the right gear set and between the other pinch roller and the gear at the lower end of the right gear set respectively; pinions in the right gear set are connected with the frame through spring supports; a brake gear is arranged below the left gear set on the lower portion of the frame, and a speed limiter is arranged between the brake gear and the left gear set. The automatic device for escaping from the high building is safe in use, reliable, convenient to use and simple in structure.