10％。The forecast of axial thrust is a pivotal problem in the design of centrifugal pumps, especially in multistage pumps. The existing axial thrust predict methods always cost too much time and resource in experiment; the experiential formula has lower precision and narrow application range. Through the numerical simulation of the internal flow field of deep well pump, this paper obtained the pressure distribution of the pump axial end-face and the impeller surface, and the axial thrust was estimated accordingly. In order to obtain the axial thrust distribution in full condition, the experiment for the pump axial thrust was conducted. Estimated results are closely matched with the experimental results, and the maximum error is less than 10%.