Abstract: The integrity of organic industrial chain is the key factor to restrict the development of organic industry. At present, the domestic research on the integrity of industrial chain, especially the organic industrial chain integrity is almost blank, and lacks unified and effective evaluation index system. An evaluation index system of regional organic industry chain with 15 levels and 3 indicators was built by the method of analytic hierarchy process, the weight of evaluation index was determined, and the evaluation standard of the corresponding index was given, which made the system operable in the regional organic industry chain integrity evaluation. Organic industry chain integrity of Wanzai organic demonstration zone was evaluated and the overall score was 81.19, it indicated that the organic industry chain was relatively integrated. But the internal complementary level was slightly lacking, especially the self-sufficient level of organic agricultural production.