Abstract: Based on the analytical hierarchy process (AHP) and GIS technology, ecological suitability region for rice planting was evaluated according to the present situation in Guangdong, China. The evaluation index system of ecological suitability for rice planting was established by selecting 9 indices from factors of climate and landform using Delphi and expert scoring method. Furthermore, the AHP method was used to determine the weights of the different indices quantitatively. Then, the map of ecological suitability for rice planting was generated in ArcGIS 9.3. The results showed that the highly suitable regions for double cropping rice planting are in the southern coastal areas, accounting for 42.07% of total rice planting area. The moderate suitable regions distribute in central and northern parts with a percentage of 32.42% from the total rice planting area. The general suitable regions are mostly distributed in northern mountains occupying 22.86% of the total. And unsuitable regions only locate at a small area of in the north with a percentage of 2.65% from the total planting areas. This paper indicated that the combination of AHP and GIS were a good approach for rice ecological suitability evaluation, and the results acquired from the research were basically coincide with the previous zoning fruits of rice planting in Guangdong.