Based on the observed data of monthly temperature, monthly rainfall of 34 weather stations and ten-day soil humidity of typical maize agro-meteorological stations during growth period in Jilin Province from 1981 to2010, using statistical method, the changing characters of temperature and rainfall and relationship between soil hu-midity of corn farmland and climate were analyzed. The results were as follows: since 1981, the temperature was in-creasing, the rainfall was decreasing, the soil humidity was desce...