Based on the 2nd National Soil Survey Data in 1980s and the measured data of 555 soil samples (0–20 cm) in 2012, the changes of C, N and P ecological stoichiometry of different land use types over 30 years were analyzed in this paper. The results showed that soil carbon and nitrogen increased by 109.98% and 27.27% respectively, while phosphorus content remained stable in the last 30 years. Soil C︰N︰P ratio of 1981 was 7.28︰1︰1 and was 16.41︰1.37︰1 in 2012. The contents of soil carbon and nitrogen all increased in each land use type, especially in forest and grassland and garden; the contents of soil phosphorus retained stable in paddy field, dry land and orchard while decreased significantly in forest and grassland. Soil C/N, C/P and N/P increased in each land use type. In the last 30 years, carbon storage of topsoil increased significantly, nitrogen storage remained stable and phosphorus storage declined.