Selected a relatively flat farmland with the area of 35 m × 30 m, located 68 sites and collected 112 samples in total, vertical distribution and horizontal distribution of 137Cs in the agricultural soil were analyzed. The results indicated that the activity of 137Cs concentrated in the topsoil of the agricultural soil, and ranged from 2.92 to 4.01 Bq/kg for every stratified sample and from 28.77 to 30.98 Bq/kg for all whole samples, which proved the characteristic of homogeneity in the vertical and horizontal distribution on soil surface.