Multifunctional combined drilling device

The utility model relates to a multifunctional combined drilling device which comprises a drill jig fixing frame, a drill jig, a plurality of double-layer connecting frames, a middle cushion block, a plurality of inserting rods and a fixing piece. The transverse drilling position of the drill jig is adjusted by controlling the sliding displacement of the double-layer connecting frame in the side opening of the drill jig fixing frame, and the longitudinal drilling position of the drill jig is adjusted by controlling the sliding displacement of the inserting rod in the hollow part of the double-layer connecting frame. The device is ingenious in design, simple in structure, capable of achieving rapid and accurate machining of hole groups with different hole diameters and hole pitches, easy and reliable to move and transport, capable of greatly reducing operation difficulty, reducing manual labor intensity, improving production efficiency, and capable of solving the problems that during existing hole group machin