Abstract: This paper presents a computational method for three dimensional flow in radial flow compre ssorls impeller with splitter blades. The SE-surface through the leading edge of the splitter blade and the flow rade through channels between this S2,-surface and long blades are determined automatically by iteration. Numerical examples show that the streamline position and the relative M number distribution May be obtained with rather good convergency by this method. Yhen the splitter blade is slightly near the mid-surface between the two long blades, the flow field is better.