Abstract: In order to design and develop an automatic separation equipment for diamond synthesis blocks, an evaluation criterion system for automated separation schemes was established and three schemes for automatic separation of diamond synthesis blocks were proposed and analyzed by analytic hierarchy process (AHP). The weight of each criterion was determined and so was the score of each scheme under a single criterion. Then the separation scheme was selected according to the hierarchical ranking conclusion. The selected scheme was evaluated by using fuzzy evaluation, which was to assess the scheme based on the evaluation criterion system using a single factor fuzzy comprehensive judgment method, to get a overall ranking. The results show that the accuracy of the system could be proven by experiments and that the scheme determined by AHP satisfied the requirements of the synthesis company.