In recent years,excessive application of chemical fertilizer in tea gardens has resulted in a series of problems,such as the increase of soil acidification and decrease of organic matter content,which has affected tea yield and quality.Biochar is generally alkaline,with high carbon content,specific surface area,high biochemical stability and strong adsorption properties and other properties,which can increase soil carbon storage,improve soil pH and nutrient availability.Biochar played a great role in soil carbon fixation,soil improvement and inhibition of soil nitrogen and phosphorus loss,improvement the quality of agricultural products of tea field.The present study aimed for the main problems of tea field soil in China,studied the characteristics of biochar and the mechanism of soil improvement by biochar,emphasized on amelioration of soil acidification,soil leaching loss,carbon sink etc,and the mechanism of biochar to improve tea yield and quality.Based on the results of the study,the research direction of biochar in the tea field management is prospected,which will provide the scientific basis for the application and popularization of biochar in agricultural production.