The invention discloses an electrolytic comprehensive utilization method of naphthoquinone raffinate. According to the method, the raffinate is filtered and is then divided into two parts; one part of the raffinate is proportionally added with sulfuric acid to prepare anode liquor; the anode liquor is put into an anode circulating tank; the other part of the raffinate is proportionally added with boric acid, an amide compound and carboxylate to prepare cathode liquor; the cathode liquor is put into a cathode circulating tank; by electrolysis, the content of Cr6<+> in the anode liquor is increased and the anode liquor can be returned to a naphthoquinone production line to be recycled; a metal chromium sheet obtained on a cathode plate is washed, dried and crushed to obtain metal chromium powder. According to the method disclosed by the invention, electrolytic circulating tanks are used for electrolysis of the naphthoquinone raffinate, the treated raffinate can be returned to the naphthoquinone production line, and high-quality metal chromium powder can be obtained; moreover, the method has the advantages of low energy consumption, low pollution and high chromium recycle rate.