Elevator-out-of-control automatic braking device

The utility model relates to a braking device, in particular to an elevator-out-of-control automatic braking device. The elevator-out-of-control automatic braking device comprises an elevator-out-of-control automatic braking device body. The elevator-out-of-control automatic braking device body comprises an umbrella-shaped air flow cover fixed to the top of a lift car. At least two high-impacting-force air outlet holes are formed in the air flow cover. An umbrella-shaped air cover is arranged right above each high-impacting-force air outlet hole. Each air cover is installed on a support and can vertically move along a vertical arm of the support. One end of each support is fixed to the air flow cover, a triggering arm is installed at the top of each air cover, an electromagnetic triggering switch is arranged above each triggering arm, an electromagnetic brake is connected to each electromagnetic triggering switch in a controlled mode, one end of each electromagnetic brake is fixed to the lift car, and brake blocks of the electromagnetic brakes are connected to lifting rails of the lift car in a clamped mode. By means of the elevator-out-of-control automatic braking device, automatic braking can be carried out when an elevator fails, and the personal safety of persons in the elevator can be guaranteed.