The utility model discloses an intelligent railway station platform safety reminding device which is composed of a metal support, a power supply, a control module, an ultrasonic ranging module, a wireless communication module, a voice reminding module, a lamplight warning module, a mobile terminal and a background management system. The ultrasonic ranging module is used for detecting the distancebetween passengers and the ultrasonic ranging module. The wireless communication module is used for receiving distance information and transmitting the detected distance information to the control module, the control module controls the voice reminding module and the lamplight warning module to be turned on and turned off according to the received distance information, and meanwhile the control module transmits alarm information and alarm release information to the background management system through the wireless communication module and then transmits the alarm information and the alarm release information to the mobile terminal. The alarm device can be flexibly arranged according to actual needs, is simple and convenient to install, can give out sound and light alarm to passengers who are about to cross the safety warning line, enables workers to receive alarm information and the position of the alarm device in real time and deal with the alarm information and the position of the alarm device in time, and can greatly reduce the occurrence rate of accidents.