The invention discloses a connecting method of similar or dissimilar alloys and belongs to the technical field of material connecting. The connecting method comprises the following specific steps that (1) pretreatment before connecting is conducted, specifically, firstly according to a specific environment and a connecting portion, a connected part and a material W are cut according to a needed shape, and after grinding, polishing and oil removing, the connecting portion of the connected part is bound for fixing through a Ni wire; (2) the connecting process is conducted, specifically, a pulse plating power supply is adopted, the connected part, namely a cathode is connected with the W, namely an anode through a Pt wire, the connected part and the W are put into molten salt of Na2WO4 and Na2WO3, the plating connecting link is conducted under the environment being 800-900 DEG C, and the electro-deposition time is specifically determined according to the size of the connected part and the connecting portion and is commonly larger than 30 h; and (3) the after-treatment stage is conducted, specifically, a well-connected sample is taken out of an electrolyte, the adhered molten salt is carefully washed away through a NaOH water solution, acetone and deionized water, and the sample is dried through cold air blasting after water washing. According to the connecting method, the technological process is simple, compared with electric welding connecting, the connecting portion is more uniform and compact, no crack exists, and the surface oxygen content of a connecting area is low.