To accurately predict the environmental impact of electromagnetic radiation at TD-SCDMA base station, the paper proposed a new prediction mode of environmental impact of electromagnetic radiation at TD-SCDMA mobile communication base station by introducing the fitting function of antenna direction and the downlink duty ratio parameters on the basis of electromagnetic radiation prediction model in free space. Compared with free space electromagnetic radiation prediction model, this new model could more accurately predict (relative error reduced from 876% to 140%) the three-dimensional distribution of the electromagnetic radiation environment around the base station. The new prediction mode would not only provide theoretical basis and scientific evidence for environmental management department, but also further help popularize the knowledge of environmental impact of mobile base station electromagnetic radiation.Cited