Tool and method for reducing hot isostatic pressing deformation of investment casting turbine blade

The invention discloses a method for reducing hot isostatic pressing deformation of an investment casting turbine blade. The method comprises the following step a of finding the gravity center of the turbine blade by utilizing three-dimensional cartographic software, and adjusting the posture so that the inertia principal axis direction of the turbine blade is parallel with the gravity direction; the step b of designing a tool, so that the shape of a blade root containing cavity is matched with the blade root of the turbine blade adjusted in the step a; and the step c of putting the turbine blade into the tool for hot isostatic pressing, so that the inertia principal axis direction of the turbine blade is always kept parallel with the gravity direction in the hot isostatic pressing process. The invention further provides a tool for reducing the hot isostatic pressing deformation of the investment casting turbine blade, and the tool comprises a tool base which is horizontally arranged, and the tool base is pro