Abstract:The blueberry (Vaccinium uliginosum L.) demands strict soil conditions in cultivation, and it needs strong acid soil with abundant organic matter. In order to solve the soil limitation, wood vinegar and pine needle were added to the soil of “Blomidon” and “Northland”. Through the determination of plant height, soil pH, content of soil available N, P2O5, K2O and organic matter, number of soil microorganism to study the effect of wood vinegar and pine needle on soil improvement of blueberry. The results showed that plant height of all treatments had significant difference compared with contrast. The treatment C (rural soil︰pine needle = 3︰1 + wood vinegar 20 ml/pot) was best. And plant heights of Blomidon and Northland were 32.3 cm and 37.7 cm, increased by 19.0 cm and 14.6 cm compared with contrast. The soil pH of treatment D (rural soil︰pine needle = 3︰1 + wood vinegar 30 ml/pot) was the lowest. The pH of Blomidon and Northland were respectively 4.87 and 4.73. With the increase of wood vinegar usage, soil available nitrogen content rised at first and then reduced later. The available nitrogen contents of Blomidon and Northland increased by 29.6 mg/g and 69.6 mg/g compared with contrast. The more wood vinegar usage, the higher the available P2O5 content, the available P2O5 contents of Blomidon and Northland increased by 88.8 mg/g and 78.0 mg/g compared with contrast. The increased amount of K2O was mainly attributed to pine needle. Wood vinegar had not significant effect. The treatment C of Blomidon and treatment D of Northland were the highest in organic matter, which were 47.0 g/kg and 55.0 g/kg respectively. Wood vinegar of different additives had different control function. The change of soil bacteria number was higher while actinomycetes and fungi were lower. In conclusion, wood vinegar and pine needle could meet the special demand of blueberry on low pH and high organic matter content of soil and had positive effect on soil improvement of blueberry.