In order to quickly and efficiently obtain good cutting performance parameters for heavy cutting, a method is proposed, combining Taguchi method and fuzzy logic, getting the optimal design of cutting parameters for side milling SUS304 stainless steel in heavy cutting process. Because of the evaluation of the tool life and metal removal rate in the heavy cutting process, was affected by spindle speed, feed per blade, axial depth of cut and radial depth of cut, so the four cutting parameters were set as controllable factors. First, through the Taguchi method, each quality characteristic was converted into S/N ratio, then through fuzzy logic operations, finding the best level combination of cutting parameters by using multiple quality characteristics(MPCI). The results show that, the best level combination of cutting parameters obtained by the fuzzy Taguchi method, can effectively improve the cutting performance in side heavy cutting process, which provides reference for tool manufacturers or tool users seeking optimal cutting conditions.