The invention provides a high-efficiency mixer for producing a neodymium-iron-boron magnet. The high-efficiency mixer for producing the neodymium-iron-boron magnet comprises a base, a rotating box, supporting shafts, bearing pads, protecting covers, an opening, sliding grooves, mixing rods, a nitrogen inlet, a nitrogen outlet, upper floating holes, lower floating holes, an air inlet pipe, an air purifier and an air pump device. The supporting shafts are symmetrically arranged at the middle of two sides of the rotating box, the rotating box is arranged on the upper part of the base through thesupporting shafts in an erecting mode, the bearing pads for limiting the radial position of the supporting shafts are connected to the upper parts of the supporting shafts, and the protecting covers for limiting the axial position of the supporting shafts are connected to the end parts of the supporting shafts. According to the high-efficiency mixer for producing the neodymium-iron-boron magnet, the sliding grooves and the mixing rods are arranged, when the rotating box begins to start rotating, the mixing rods in each sliding groove fall and slide alternately due to gravity action, a mixing role is played on iron-boron magnetic powder of an inner cavity, the mixing uniformity is improved, the mixing quality and efficiency are improved, the structure is novel, the installation is easy, andthe operation is easy.