Design of a centrifugal pump is carried out and analyzed to get the best performance point for a certain impeller blade angle. Due to high demands by industry for centrifugal pump equipment, there is, the study of has centrifugal pump impeller mass flow rate is important. This paper deals with the design and performance analysis of centrifugal pump by changing the impeller blade angle. In this paper, a centrifugal pump is analyzed by using a single-stage centrifugal pump. It consists of Two main components of a centrifugal pump are the impeller and the casing. The impeller is a rotating component and the casing is a stationary component. In a centrifugal pump, water enters axially through the impeller eyes and water exits radially. The pump casing is to guide the liquid to the impeller, converts into pressure the high-velocity kinetic energy of the flow from the impeller discharge and leads liquid away of the energy having imparted to the liquid comes from the volute casing. The CFD analysis is being increasingly applied in the design of centrifugal pumps. The design and performance analysis of centrifugal pump is chosen because it is the most useful mechanical rotodynamic machine in fluid works which widely used in domestic, irrigation, industry, large plants and river water pumping system. Moreover, centrifugal pumps are manufactured in many industries.