Abstract: Ergonomics of manned spaceflight involves such factors as astronauts, manned spacecraft and the flight environment, including not only the studies of physiology, psychology, medicine, but also the studies of system engineering des igning, the environment, communication, math etc. This paper, combining the dome stic and foreign theories with a special interest in NASA's Space Human Factors Program (SHF), makes an ergonomic analysis about the outer cloths of astronaut, computer simulation of activities, and man/information/automation interactions. On the basis of the analysis, the paper puts forward some suggestions as to the improvement the national space engineering.