Abstract: Soil acidification and nutrient impoverishment are the main reasons that affect the tea index in high altitude areas. Organic amendments can not only slow down soil acidification rate, but also improve soil fertility properties. In this paper, Cloud tea Garden at 1100 m altitude in Lushan Mountain was selected as the tested object, and the phosphorus-rich amendment and rapeseed cake were used as the organic amendments to carry out positioning monitoring for three years and analyze the sustainable response of the soil-tea system after one single time application of the amendments. The research results showed that Phosphorus-rich amendment and high/low dose rapeseed cake can slow down the acidification rate of tea garden soil, and the range of soil pH was belong to Ⅱ suitable soil according to the standard of Environmental Technical Conditions for Tea Production Area (NY/T853—2004). In the first year, the soil nutrient indexes were significantly increased compared with the control (P < 0.05). In the second year, the soil nutrient regulation effect of phosphorous-rich amendments and high dosage rapeseed cake was still significantly higher than that of the control group (P < 0.05). The contents of organic matter, alkali-hydrolyzed nitrogen and available phosphorus in soil treated with phosphorous-rich amendment were still 17.2%, 78.9% and 19.6% times higher than those indexes in the first year. The contents of chlorophyll and polyphenols in tea also increased significantly in the first year (P < 0.05). And the contents of polyphenols in the tea still remained from 299.34 mg/kg to 312.81 mg/kg. Therefore, the phosphorus-rich amendment and the high dose rapeseed cake can effectively improve the physical, chemical properties of the soil and tea quality, and the controlling effect can last for two years.