Cross-shaped hole drilling positioning device

The utility model discloses a cross-shaped hole drilling positioning device, which comprises a rectangular fixture body, wherein a through hole matched with a spline shaft head to be drilled is formed in the fixture body along the length direction of the fixture body; the central line of the through hole is accordant with the central line of an externally tangent circle of the fixture body along the direction; the fixture body is provided with a positioning screw hole for fixedly positioning the spline shaft head to be drilled; meanwhile, the fixture body is provided with a drill hole which corresponds to a hole drilled in the spline shaft head to be drilled. The cross-shaped hole drilling positioning device has the advantages of simple structure, convenience in use, improvement on the stability of product positioning, avoidance of damages to a drill bit caused by swinging of a product, high drilling accuracy, and suitability for mass production.