The invention provides a purification method for nickel electric accumulated liquid for manufacturing a high-purity nickel plate, relates to high-purity nickel plate manufacturing, in particular to a purification method for a nickel solution for manufacturing the high-purity nickel plate. The method is characterized in that the nickel electric accumulated liquid for manufacturing the high-purity nickel plate is a nickel chloride solution, and an organic solvent extraction method is adopted for purifying the nickel chloride solution for manufacturing the high-purity nickel plate till the content ratio of nickel and cobalt in the solution is larger than 400000. The sample purity of the a high-purity nickel plate produced through the electric accumulated liquid purified through the method is 99.999%, the content of the cobalt and the content of the nickel are both smaller than 1 ppm, and the content of iron is smaller than 2 ppm. By the adoption of the method, the process is simple and feasible, the product quality is high, and stability is good; and the nickel chloride solution with impurities removed meets the requirements for manufacturing high-purity nickel and producing other high-purity nickel products.