The growth，chlorophyll content，and evalualiton taste of radish sprouts under 1~6 days light conditions were performed，in order to provide rational cultivation guidance for radish sprouts.The results showed that with the increase of the light days，radish sprouts height became short and fresh weight increased，while the change of stem diameter was not apparent.Also，chlorophyll content increased，but radish sprouts gradually became poor taste.All of these factors were considered，the conclusion could be made that 4~5 days light was the most reasonable for radish seedling cultivation.