Abstract: Based on the method of finite difference time domain (FDTD), the analysis of the distribution of localized specific absorption in human tissues is made under the two electromagnetic radiation sources. In this paper, the imitative analysis and calculation on specific absorption rate (SAR) to the part of human body is achieved, especially head phantom, using 3D numerical electromagnetic computer software. Simulation results show that the distribution of absorption dosage of electromagnetic radiation to human body is of very asymmetry, which is effected by many parameters, such as radiant frequency, radiant intensity, exposure time, conductivity and permittivity of human tissues. Therefore, it will reduce the SAR to the human body by reducing electrical current on the surface of mobile telephone and avoiding resonance frequency of human body.