Abstract: Based on the climate data of 119 meteorological stations from 1971 to 2010 in Henan Province and the biological characteristics of tea plants, the key meteorological factors affecting the growth and yield of tea plants were identified. The correlation coefficients between the meteorological factors and the yield were calculated and the significant correlation factors were selected as the climatic zoning indexes. By using of Analytic Hierarchy Process (AHP) to construct the judgment matrix of each index and test the consistency of the judgment matrix, the weight of each index was determined. Using the weighted mean method to calculate the comprehensive regionalization index of tea planting in Henan Province, the climate suitability regionalization with a fine mesh accuracy of 250 m was achieved based on the GIS platform. The area was divided into 3 grades: suitable, sub-suitable and unsuitable. The suitable, sub-suitable and unsuitable areas accounted for 11.8%, 28.8% and 59.4% of the total evaluation area, which were coincident with the actual tea planting situation in Henan province. The results provided a basis for scientific layout of tea planting in Henan province.

Key words: analytic hierarchy process, weighted index sum method, climatic suitability regionalization, result verification