As 5G technology advances, the large-scale deployment of 5G base stations has led to an increase in electromagnetic radiation intensity in the environment, which may pose a potential threat to public health. This study, based on the principles of electromagnetic dosimetry, establishes a standard human body model and calculates the dielectric parameters of human tissues using the four-order-Cole-Cole model. Using the HFSS module in Ansys Electronics Desktop software, a 5G base station antenna array was designed, and the electromagnetic exposure levels to the human body at different positions were calculated. The results show that, in the main radiation direction, the maximum local SAR for the human torso is 1.53×10?3 W/kg, the maximum local SAR for the head is 0.020 9 W/kg, and the maximum incident power density is 0.007 13 W/m2. In the edge radiation direction, the maximum local SAR for the human torso is 2.24×10?? W/kg, the maximum local SAR for the head is 9.49×10?? W/kg, and the maximum incident power density is 9.49×10?? W/m2. All results are below the public exposure limits set by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), indicating that the electromagnetic exposure levels produced by the base station antenna do not pose a threat to public health.