A field experiment was conducted on soil environment and product ivity formation process of corn in 5 major types of farmlands of Horqin. Results show that: (1) in terms of average soil water content during the growth period of corn the 5 main types of cropland were in the order of irrigated sandy loam (A, 12.4%) > irrigated loam sandy soil (E, 9.50%) > dry slop land of sandy loam (B, 8.87%) > dry land of sandy loam (C, 6.55%) > dry land of sandy soil (D, 5.70%);of average soil temperature they were in the order of D (22.04℃) > C (21.73℃) > B (21.40℃) > E (21.08℃) > A (21.05℃);and of integrated index of soil nutrients they were A (93.9) > C (84.3) > E (84.2) > B (65.3) > D (48.4);(2) in terms of plant height (cm) and biomass (kg m^-2) of corn they were in a sequence of E (270, 2.96) > A (245, 2.70) > B (225, 2.12) > C (220, 1.86) > D (181, 1.32);(3) Correlation coefficients between biomass and soil indexes were in such an order as N, P, K (R= 0.860) > soil moisture (R= 0.837) > soil organic matter (R= 0.753).