Abstract:At present, safety accidents caused by falling from a high place account for the highest proportion in the construction industry. The safety of construction workers falling from heights urgently requires information technology to automate safety management.Based on this,this paper combines BIM,cloud computing and RFID technology,by analyzing the factors of falling accidents at high places and proposing system construction ideas and targeted design early warning system function modules,then build a construction worker's high fall safety warning system based on Cloud-BIM,divide the rules and warning standards for high-altitude hazardous areas,design the operation process of the early warning system,reasonable selection of RFID devices and placement of readers.The application of the system realizes the information of the safety management of falling from a height,it c an effectively reduce the incidence of construction workers falling from high places,it is of great significance to the information development of building construction safety management.