Abstract: Through the investigation on 418 soil samples from tillage layer in tea garden in Yongchun, it was found that acidified tea gardens with soil pH<4.5 was the main type of middle and low productive tea garden in Yongchun. The acidification caused by soil factor, tea plant itself and human factor etc. Some measures could modified the status, such as ecological tea garden construction, chemical modification, increasing application of organic manure and the popularization of soil testing and fertilizer recommendation, and so on.