With the increasing density of 5G base station in recent years, the influence of the electromagnetic radiation level of 5G base station has become one of the most important factors restricting the development of 5G communication technology. In order to solve the problem of electromagnetic radiation limits around 5G base station, an evaluation method is proposed to predict the electromagnetic radiation level of 5G base station. Assuming that the user capacity of the cell covered by the base station is known, a statistical model is adopted to calculate the maximum power density around the base station. On ANSYS Savant, the accuracy and feasibility of the predictive method are verified by simulating the maximum power density around the 5G base station. This method has certain guiding significance for future location of base station.