In order to understand the soil pH value status of grape producing areas in Yunnan province，the spatial distribution characteristics and key influencing factors of soil pH value in different areas of grape producing areas were studied.Based on survey sampling and ArcGIS spatial analysis method，the spatial distribution map of soil pH at sampling points for different producing areas in Yunnan province was drew，and the distribution differences of soil pH values in the main grape producing areas(Jianshui county，Yuanmou county，Binchuan county and Mile city)，different planting modes(protected cultivation，open field cultivation)and different planting years(0～5，5～10，10～20，20 years and above)were analyzed.The results showed that:① the pH value in grape soils of Yunnan province varied from 4.29 to 8.30.The strongly acidic soils were basically distributed in Maitreya city and Yuanmou county.The slightly alkaline soils were mainly distributed in Binchuan county，while the grape soils in Jianshui county were mainly between slightly acidic and neutral.The coefficient of variation of the four main production areas was Yuanmou county>Binchuan county>Mile city>Jianshui county.② Different planting patterns significantly affected the pH value change of soil in grape producing areas.For example，the pH value in soils for protected grape planting treatments(including greenhouse planting and semi-greenhouse planting)was significantly lower than that for open grape planting.③The soil pH values showed a downward trend with the increase of protected grape planting years.Among them，the soil acidification in Mile grape producing area was relatively serious.It suggested that geographical and climatic conditions(humid and rainy climate，soil types of，red soil and yellow soil and parent materials of sand shale and granite soil)，long-term protected cultivation and large-scale application of acidic or physiological acidic fertilizers would be the main reasons for soil acidification.In conclusion，the investigation results can provide a theoretical basis for the scientific management and regional improvement of acidified soil in the main grape producing areas in Yunnan province.