Abstract: After the integral cast runner of a water turbine is machined, its impeller's multi-angle blade surfaces, being irregular sculptured surfaces, have the problems of numerous detection points and cumbersome procedures. In response to this, this paper designs an efficient detection tooling frame for multi-angle blades of integral cast runners. This tooling frame is manufactured based on the 3D model of the runner. By setting up detection templates designed according to the characteristics of the horizontal cross-sections of the blades, it realizes efficient detection of the multi-angle irregular twisted profile surfaces of the runner. Through practical application, this tooling frame simplifies the detection procedures, improves detection efficiency and accuracy, and provides an effective solution for the detection of integral cast runners of water turbines.