Based on the accurately whole-body computational phantom of Chinese adult (Rad-HUMAN), an accuracy external radiation dose assessment method was developed for the purpose of radiation protection. Due to the large amount of calculation, the existing computing method of the method mentioned above cannot meet the real-time requirement of virtual simulation. Based on parallel technology, a voxel model-based parallel external radiation dose assessment method has been developed. The method has been used in the dose assessment of accelerator driven lead-bismuth cooled reactor target’s replace. The results showed that the proposed method could real-timely assess accurate radiation dose based on voxel model.Cited