Impeller mould

The utility model relates to an impeller mould, comprising an upper half mould and a lower half mould, wherein the centers of the upper half mould are respectively the upper half shape mould and the lower half shape mould of an impeller product, the upper half shape mould is an outer outline groove (1) of the impeller product with a protruding structure in the center, and the lower half shape mould is arcs (4) radiating from the center to the periphery. Stand column grooves (2) and stand columns (3) are respectively arranged on the positions corresponding to the four corners of the upper half mould and the lower half mould. The utility module can solve the problem on reasonable structure design of the impeller mould in the prior art.