The trends of soil pH and nutrient changes is of great significance for soil nutrient management，scientific fertilization，tailored construction of high standard farmland and continuous promotion of soil testing and formula fertilization technology. The spatiotemporal distribution and grade change characteristics of soil pH and nutrients in Dongpo district，Meishan city over the past 40 years were compared and analyzed by collecting data from the second national soil census in 1980，the land fertility evaluation data in 2010，and the third national soil census data in 2022. In the past 40 years，the soil pH in the study area gradually decreased，and the overall nutrient content showed an increase followed by a decrease in organic matter and total nitrogen content，while the contents of available phosphorus and available potassium showed an increasing trend. The overall pH of the soil in the western region showed relatively acidic，and various nutrient indicators were characterized by high values in the central and eastern regions and low values in the western regions. In terms of grade change，soil acidification was serious in the whole region，and all nutrient indexes were at a medium or above medium level. The phenomenon of cultivated soil acidification in the whole area was serious，and the overall nutrient trend was increasing. This study could provide scientific basis for the construction of high standard farmland and nutrient management in Dongpo district.