Efficient arc-shaped groove positioning tool

The utility model discloses an efficient positioning tool for an arc-shaped groove, which relates to a mechanical tool and comprises a tool fixing plate, two positioning columns are arranged on the fixing plate, an included angle between the two positioning columns is 120 degrees, and arc-shaped positioning blocks are arranged on two sides of one positioning column. The arc-shaped positioning block is detachably connected with the fixing plate, the arc-shaped positioning block is used for fool prevention, three circles are machined on the bottom of the valve body in a circumferential array mode, an arc is arranged between every two adjacent circles, the side edge of one arc needs to be machined, and the positioning column can only position the base. The angle for placing the valve body each time cannot be ensured to be correct, so that the angle of the valve body needs to be limited by an arc-shaped positioning block, and the consistency of the placing angle of the valve body is ensured. The positioning colum