The nutritional status of magnesium in acidified tea gardens was studied to guide the fertilizer application of tea gardens.A total of 297 surface soil samples were collected from the main tea-producing towns in Anxi County.Descriptive statistics were applied by measuring soil pH and soil exchangeable magnesium concentration.In addition，the distribution characteristics were studied and the correlation between soil pH and exchangeable magnesium concentration was studied by correlation analysis.The soil pH of tea area varied from 3.1 to 6.7 and there was more than 68% tea gardens soil pH were lower than 4.5，and the status of soil acidification was serious.The exchangeable magnesium concentration was varied between 1.0～79.0 mg·kg-1，the average value was 23.7 mg·kg-1，and 82% of the tea garden soil exchange magnesium was less than 40.0 mg·kg-1，which suggested insufficient soil exchange magnesium nutrition.Soil pH and soil exchangeable magnesium showed a very significant positive correlation，which is consistent with spatial distribution of tea production in Anxi.The acidification of tea garden soil and the lack of magnesium nutrition are common in tea garden production.It is suggested to reduce input N fertilizer and complement magnesium in tea garden to ensure high quality and efficient production of tea.