This study deals with the flow analysis of centrifugal compressor impeller. The impeller design based on parameters flow analysis using air as the working fluid shows that a 0.162m diameter centrifugal compressor with a blade outlet width of 0.0021m gives a static pressure ratio of 4:1. In this design, the impeller blade have exit angle 65º with inlet blade angle 37.74º. So, this compressor is backward-curved blades. The number of blades having 19 equally spaced vanes with the profile is used to improve compressor efficiency. This is the single stage compressor. Theme of centrifugal compressor is to atomize diesel. So, it can more ignite in combustion chamber.