Metro platform screen door automatic monitoring and alarm prompting system

The invention relates to a metro platform screen door automatic monitoring and alarm prompting system, which comprises a train detection and evacuation indicating unit, a signal transmitting and receiving unit, a main monitoring system and a control center server which are in communication connection successively, wherein a standby service unit is arranged between the control center server and the signal transmitting and receiving unit, and the standby service unit is connected with the main monitoring system; and the train detection and evacuation indicating unit comprises an uplink train detection and evacuation indicating unit and a downlink train detection and evacuation indicating unit. According to the metro platform screen door automatic monitoring and alarm prompting system, the operating state of a train in a section is displayed in real time according to accurate train position information provided by the train detection and evacuation indicating unit, the position information of the train can be mastered by a signal processing and displaying unit once the train is stranded in the section for some reason, and an emergency evacuation scheme is started quickly and scientifically, thereby ensuring that people inside the train can be evacuated to a safe region timely and reasonably.