The invention discloses a bus bar positioning punching machine which comprises a working platform and a hydraulic punching device mounted on the working platform, wherein dowel pin devices which extend front and rear are separately arranged on positions, positioned at the left side and the right side of the hydraulic pumping device, of the working platform; each dowel pin device comprises a fixed sleeve fixedly arranged on the working platform and a locating insertion pin which is movably inserted into the fixed sleeve in a penetrating mode; a long slot is horizontally formed in the top tube wall of the fixed sleeve; a regulating handle which gets out of the long slot is fixedly arranged in the radial direction of the middle part of the locating insertion pin; and a plurality of positioning blocking slots for allowing the regulating handle to block are horizontally formed in the tube wall of the long slot at equal distance. The bus bar positioning punching machine is simple in structure, is convenient to use, is accurate in position, effectively improves punching efficiency of a bus connecting hole, and solves the problems in the prior art.