Abstract: According to experimental results and related oversea materials,this paper proves that the disorder of blood circulation of humanand animal during weightlessness and simulated weightlessness is verysimilar to the changes accompanied by the discase called“blood stasis”in Chinese medicine.The writer puts forward the opinion that the Chinesemedicine herbs used to invigorate the blood circulation and eliminate theblood stasis have great capability to prevent the blood circulation disorderduring space flight.