The centrifugal pump impeller includes that the angle is set for the monolithic blade for being less than 360. When the angle of establishing monolithic blade leading edge be 0 and the angle of trailing edge be after 1, the radius pressure face of monolithic blade, that count from the impeller center is for the angle increase of this monolithic blade and the increasing amount that increases is the negative value at the angle within range of regulation. And the radius wing central line of monolithic blade, that count from the impeller center is for the angle increase of monolithic blade and the increasing amount that increases is in the angle within range of regulation is the negative value.