Abstract: One-year-old seedlings of blueberry‘Zhaixuan No.7’was used as experiment materials,and treated with red light（R）,blue light（B）,yellow light（Y）,red-blue ratio of 3:1（3R1B）,red-blue ratio of 1:3（1R3B）,red-blue ratio of 1:1（1R1B） and white light（W,CK）for two months（60days）,the effects on the growth and physiological characteristics of blueberry under different light conditions were investigated,in order to provide reference for high-efficiency cultivation of blueberry.The results showed that under different light quality treatments,the plant height,average crown width,stem thickness and biomass showed a gradual increase trend.On the 60th day,the plants had the largest height,total fresh weight and total dry weight under B,the longest root length under 1R1B,R and 3R1B,and the largest stem thickness under 1R3B.Under different light quality treatments,the chlorophyll content in leaves increased first and then decreased,GSH and total protein content changed relatively smoothly,SOD activity and AsA,H₂O₂ contents showed an overall downward trend,MDA content and the production rate of ■ were increased.On the 60^th day,SOD activity and AsA and GSH contents were the highest under B,chlorophyll content was highest under 1R3B,■ production rate decreased under 3R1B,and H₂O₂ content decreased under Y treatment.In conclusion,3R1B and B treatments are beneficial to growth and development of blueberry.