The invention discloses a mobile phone remote control broadcast system for construction site management, comprising wireless receiving broadcast terminals, a mobile phone SIM card, a GSM voice switch,an FM wireless frequency modulation transmitter, a wired microphone, a user mobile phone and an outdoor antenna, wherein the user mobile phone dials the mobile phone SIM card built in the GSM voice switch, after dialing, the GSM voice switch transmits user audio signals to the FM wireless frequency modulation transmitter, and frequency modulation signals are transmitted through the outdoor antenna, are received by the wireless receiving broadcast terminals deployed at different locations of a construction site, and then are broadcast by a built-in sound box to complete the real-time transmission of information. The system combines multiple independent units to form a set of intelligent system that can dial calls at any time and is efficient and convenient, the entire information transmission process takes only 3-5 seconds, users can be free from the constraints of time and space, and can deal with and prevent emergency situations in a timely manner, the operating efficiency of the construction site can be effectively improved, the labor cost can be reduced, and the safety management of the construction site can be strengthened.