Powder was likely to be pressed,rubbed, blocked in the delivery process of superfine powder, so superfine powder atomization mechanism was developed and the basic principle of superfine powder feeder was introduced, then a new type of superfine powder feeder was designed. Performance experiments and distant delivery experiments were performed. It was shown that the adoption of special structured mixer avoided aggregation’s occurrence, enhanced the delivery performance of the superfine powder ; linear relation occurred between powder feed rate and wheel speed; optimum working range of air flux was 3～8 L/min; stability was fine and its delivery error was less than 1.8%; stiffness was proportional to air flux, but it was incerse proportion to nozzle, and its distant delivery ability was good.