The invention relates to an auxiliary device for an illuminating lamp, and particularly relates to a heavy-current wire distributing, power taking and current shunting device. The heavy-current wire distributing, power taking and current shunting device comprises a cable wire, puncture needles, a base and an upper cover, wherein the upper cover cooperates with the base; the upper cover and the base are located above and below the cable wire respectively; the puncture needles penetrate through the upper cover and the cable wire from the top of the upper cover and are in contact with the base; the cable wire is a flat cable wire with a dumbbell-shaped cross section; wire cores of the cable wire are arranged at the end part of the dumbbell-shaped cross section in parallel; the puncture needles are rectangular parallelepipeds with cross sections in rectangular-ambulatory-plane shapes; the lower parts of the puncture needles are provided with openings cooperating with the wire cores of the cable wire; the top of the base is provided with a groove cooperating with the upper cover; the side surface, which intersects with the cable wire, of the base is provided with an open hole matched with the outer contour of the cross section of the cable wire; the top of the upper cover is provided with a bulge; the top of the bulge is provided with open holes through which the tops of the puncture needles are exposed.