Abstract: An electric planing knife comprising: a knife rest with a planing cavity formed within the knife rest and adapted to permit insertion of a pencil-shape object; a cutter comprising a blade, wherein the cutter is mounted within said planing cavity; and an electric circuit disconnector comprising a trip lever and a resilient elastic reset switch, said elastic reset switch being disposed under said planing cavity, the upper end of said elastic reset switch being located within said planing cavity, the upper end of said trip lever being connected with said elastic reset switch and being disposed below said elastic reset switch, said elastic reset switch being electrically connected to said cutter; and a sharpness adjustor below the planing cavity.