An optimal design model of wear for multiple clearance revolute joints in the mechanical system was presented based on Kriging surrogate model and sequence quadratic optimization.Incorporating the coupling theory between wear and mechanical dynamics,an automatic design process of “design parametersLatin hypercube sampling methodsurrogate modeloptimization” was proposed.A calculation tools was developed with Matlab software and optimal design code.The optimal programme was applied to the design of a slidercrank mechanism for attaining the maximum allowable wear depth of two joints simultaneously.Contrastive analysis between optimal results and test data indicate that the optimization method based on Kriging model can get higher accuracy with the maximum error of 4.7% but obtain less computational cost and demonstrates as tribological optimal design method for clearance joints of mechanical system.