Abstract: Due to the fact that the safety protection equipments of the railway construction were with the characteristics of single function, strong labor dependence, low overall reliability, construction personnel safety and traffic safety risk of rail car, according to the idea of "train to ground, ground to train, man-train interaction, two-way alarming", this article researched and developed railway construction safety comprehensive protection system based on Internet of Things(IOT). This system could effectively reduced the labor safety risk on construction work, improved the efficiency of protection, simplified the allocation of protection personnel.