Drilling device capable of improving precision and used for metal structural part machining

The utility model discloses a drilling device capable of improving precision for machining a metal structural part, which belongs to the technical field of drilling devices and comprises a base, a drilling mechanism is arranged at the top of the outer surface of the base, a position adjusting device and an auxiliary clamping device are arranged at the top of the outer surface of the base, and the position adjusting device comprises a rectangular frame. The bottom of the outer surface of the rectangular frame is fixedly connected with the top of the outer surface of the base. According to the drilling device capable of improving the precision and used for metal structural part machining, by arranging the position adjusting device, in the drilling process of a metal structural part, under the action of a first threaded rod, a screw hole plate can be matched to drive a pointer block to move, then the pointer block can be matched with a scale plate, and the position of an auxiliary plate can become accurate; and