Interval concept lattice has been proposed recently as the new definition of concept lattice on the parameters range. It can flexibly reflect the uncertainty information, and provide a solution for the mining problem of uncertain rules. Interval parameters α and β determine the interval concepts and structures, and then affect mining interval association rules. Generally interval parameters are determined artificially, that has certain subjectivity, so the interval parameters optimization is of

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... practical significance. Firstly the related theories of interval concept lattice, the building algorithm of lattice structure and the mining algorithm of interval association rules are introduced, and then interval update algorithm of concept lattice structure is designed based on the change of parameters. Through the analysis to the lattice structure update degree, we build the interval parameter optimization model of concept lattice and use the method of parameter approaching to obtain the optimal parameters. Finally the instance is given to demonstrate the effectiveness of the model.