Objective: The effect of physiological characters of Salvia miltiorrhiza induced by space flight was studied. Method: The contents of soluble sugar

soluble protein

catalase(CAT) and superoxide dismutase(SOD) activities in S. miltiorrhiza induced by space flight were investigate and compared with the contrast lines of ground. Result: The content of photosynthesis pigment in S. miltiorrhiza induced by space flight was increased enormously

the content of chlorophyll increasing by an a verage 28.5% and the content of soluble sugar reduced by nearly 42% at different part in pre-flower period. The content of soluble sugar and the content of chlorophyll showed a negative correlation. Physiological enzyme activities of CAT and SOD were higher than the contrast lines of ground. Conclusion: Space flight has the influence to the photosynthesis and the physiological biochemistry of Salvia miltiorrhiza. Photosynthetic rate and enzyme activities of CAT and SOD were increased.