The utility model discloses a portable leaf peeling knife is gathered to corncob, including a handle of a knife of being made by a cylindrical sleeve section of thick bamboo, the one end of handle ofa knife is sealed, is equipped with annular retaining ring on the other end outer wall, and internal orifice department has the internal thread. The tail end of blade is installed on one section cylinder seat, has on the cylinder seat to locate internal thread assorted external screw thread with the handle of a knife port. The width of blade is less than the diameter of cylinder seat, and the anterior segment of blade is the knife tip, and the middle section is the sawtooth. The beneficial effects of the utility model are that: this portable leaf peeling knife is gathered to corncob's handle of a knife has the function of tool magazine concurrently, carry the in -process can through the screw thread reverse with the blade collection in the handle of a knife. The blade adopts the anterior segment knife tip, and the back end sawtooth can be safer in not only using, has still increased its service function.