Full-lubricated lifting nut

The invention discloses a full-lubricated lifting nut, and belongs to the technical field of machine tool fittings. A lifting lead screw is screwed into a lifting nut through a thread; a pair of lubricating pipes for pouring the lifting lead screw is arranged above the lifting nut; four equal-angle long oil holes are drilled in the upper end surface of the lifting nut in an annular array form; thelengths of the long oil holes are 4/5 of the length of the lifting nut; a row of six equal-interval inclined oil holes is drilled on the outer side of each long oil hole on the side wall of the lifting nut; the inclined oil holes all penetrate through the back ends of the long oil holes on one side, and extend to engaged surfaces of the lifting nut and the lifting lead screw; oil plugs are arranged at the outer ends of the inclined oil holes; lubricating pipe joints are arranged at the top ends of the long oil holes on the lifting nut, and are all connected with oil incoming pipes; the lubricating pipes are also conn