Hole drilling tool for balance bridge

The utility model provides a hole drilling tool for a balance bridge. The hole drilling tool comprises a base and a shaft. Four shaft sleeves are fixedly arranged on the outer side of each shaft; thetwo sides of the base are each fixedly provided with a positioning plug pin in an embedded mode. The two ends of the shaft are each fixedly provided with a check ring. A left nut and a right nut are fixedly arranged at the tops of the two sets of bases correspondingly. And a double-thread screw is fixedly arranged between the left nut and the right nut. According to the device, the double-thread screw is additionally arranged on the basis of an old-fashioned drilling template; the left split type template and the right split type template are automatically symmetrical to the central axis of the frame; when in use, templates composed of the two groups of bases and parts thereof are respectively arranged on two sides of a frame; and then the double-thread screw is rotated to adjust the center position of the double-