Abstract: Characters of resistance spot welding procedure case are divided into two kinds:characters Ⅰ of case and characters Ⅱ of case by analyzing resistance spot welding and the CBR (case based reasoning).The retrieving strategy is proposed,that is,under the limit of characters Ⅰ thermal physical properties of material and thickness of plate in characters Ⅱ of case are taken as indexes.The knowledge and rules of spot welding procedure that are drawn out from the retrieved cases database with fuzzy inference are used to guide the solution of new procedure case.It gives a good method to solve the problem that it is difficult to build an appropriate model to revise the similar retrieved cases on CBR.In this way,the intelligent solution to spot welding parameters resembles to the way of experts in this field and has more flexibilities.