Abstract: The main feature of a reentry spacecraft communication environment is the attenuation of electromagnetic waves caused by the plasma sheath around the spacecraft. To study the attenuation impact on the communication of a reentry spacecraft, a three-dimensional simulation model should be built, which can be used to study new type communication technologies. In this paper, a method of modeling dynamical three-dimensional communication attenuation is proposed by using aerodynamics, thermodynamics and electromagnetic theorems. The modeling method of each module is discussed, as the fundamental of further research on blackout countermeasure technologies.