Automatic falling preventive system of vertical elevator

The utility model provides an automatic falling preventive system of a vertical elevator. The automatic falling preventive system comprises a speed measuring device, a bearing load measuring device, a central processing unit, a control interface unit, a safety clamp and a car buffer. A speed measuring unit and a bearing load measuring unit are connected with the central processing unit, and the central processing unit is connected with the safety clamp and the car buffer by the control interface unit, and starts the safety clamp and the car buffer when the speed or the carrying load is abnormal. The automatic falling preventive system has the advantages that abnormal conditions that the elevator is overloaded, runs too fast or too slow, and the like can be found out in real time, braking and alarming functions can be realized in real time when the abnormal conditions occur, potential safety hazards can be timely and effectively eliminated, falling accidents are prevented, and running reliability of the elevator is improved.