This paper comprehensively analyzed and summarized the main research progress of biochar in improving acid soil technology at home and abroad. In this paper, the distribution, cause of formation and harm of acid soil were introduced, the differences between biochar improver and traditional improver were compared, the structure and functional basis of biochar were expounded, and the improvement of physical and chemical properties of acid soil was analyzed. Finally, combining with the current situation of China’s agricultural development, the paper puts forward the prospect of the problems that need to be paid attention to in the process of biochar research, in order to provide reference for the application and industrial development of biochar.

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