Database system is mainly created for superhard cutting. In the paper, the processing time is considered as the objective function based on the issue needs, the establishing of the mathematical model of the cutting database system mainly takes cutting force, power tools, precision machining and tool life as constraints. And the database develops through the development software VS2008 and SQL Server 2008 database management system, using an interactive particle swarm optimization to optimize machine tool and cutting parameters, basing on fuzzy matter-element analysis method establishes the evaluation module of tool cutting of the PCBN tool turning hardened steel, and the paper gives evaluation methods.