Based on observed meteorological data at 6 basic weather stations and 27 automatic stations in Haian area in 1990—2009, this paper analyzed the agricultural climate resource characterics and wheat production climatic condition in Haian. With the support of geographic information system, the climatic factors and districts factors were refined using the spline function method. Then ecologically suitable wheat planting zoning was retrieved using the comprehensive evaluation method. The planting zoning of high quality wheat with weak fibres was divided into two zones in Haian county,the optimum zone and the suitable zone. The optimum zone included the villages and towns of the the midwest Haian, and the suitable zone included the eastern coastal region. The results provide the scientific basis for the development and utilization of agricultural climatic resources in Haian county.