The invention discloses a method for electrodissolving high-temperature alloy waste, and belongs to the technical field of electrochemistry. The method comprises the following steps that firstly, a large block of high-temperature alloy is taken as an anode and graphite is taken as a cathode; and the solution of N, N-dimethyl formamide and thionyl chloride are used for electrodissolving the high-temperature alloy block under a direct current condition. The method for electrodissolving the high-temperature alloy waste has the advantages that compared with a traditional electrolysis method, the rate of electrodissolving the large-block high-temperature alloy can be increased; and meanwhile, the stripping rate of anode slime on the surface of the alloy is 100%, so that the problem that the anode slime is attached to the surface of the alloy to influence electric dissolution is solved.