Abstract: A study on the absorption electromagnetic radiation of human in static and dynamic state was presented. The specific absorption rate was studied by using the finite-difference time-domain (FDTD) method and moving human models. Two movements including walking and running, each of which had a different dynamical characteristic, were considered. The half wave dipole antenna was used to calculate specific SAR at 0.9 GHz and 2.4 GHz, which acquired the SAR under different frequencies and different positions. The simulation results indicate that, when human walking or running, the greater the frequency the antenna works, the more electromagnetic radiation the human body absorbs, and the greater the harm to the human body suffers. At the same time, it is different for absorption of electromagnetic radiation while the human body is walking and running.