Connecting device of magnesium electrolytic bath

The utility model relates to a connecting device of a magnesium electrolytic bath, which mainly includes an electrolytic bath cathode root (1), a cathode busbar (3) and a flexible busbar (2), wherein the cathode busbar (3) is connected with the flexible busbar (2); the electrolytic bath cathode root (1) is connected with the cathode busbar (3) through an aluminum titanium steel composite material joint (4); the aluminum titanium steel composite material joint (4) is divided into a steel end (5), a titanium layer (6) and an aluminum end (7); the aluminum end (7) is connected with the electrolytic bath cathode root (1); and the aluminum end (7) is connected with the cathode busbar (3). By adopting the connecting device of the magnesium electrolytic bath, the original steel and aluminum contact resistance is reduced to 20%, the cathode resistance is greatly reduced, and a positive role is played in reducing the voltage of the magnesium electrolytic bath.