Abstract: In order to reveal the farmland soil nutrients variation characteristics in Mangshi County, we are using the core samples data from the project of testing soil for formulated fertilization in 2009, second time of soil census data and fertilizer grading standard, carries on the analysis and study. The results showed that, pH tended to micro-acidity with large area and soil put up to acidification trend; organic matter, total nitrogen and alkali solution nitrogen content in medium level with large area, but total content level tended to decline; lack of available phosphorus and available potassium content in large area, but available phosphorus increased, rapidly-available potassium decreased; the characteristics of farmland soil in Mangshi County showed tartish, organic, total nitrogen and alkali-hydrolyzable nitrogen belonged to medium to rich level but lack of potassium and phosphorus. The nutrient in dry farming soil was higher than paddy soil and with different region distribution, the whole level of fertility in cultivated land tended to decrease.