The utility model discloses a high -efficient permanent magnetism dive mixer that contains antiwind function, including impeller (1) and mechanical sealing seat (3), impeller (1) with mechanical sealing seat (3) clearance fit, impeller (1) with it is vice that mechanical sealing seat (3) cooperation position forms the shearing, cut vice by wheel hub (12) of impeller (1) go up annular rotatory sword (13) and dead knife (35) cooperation on mechanical sealing seat (3) interior circumference forms. The utility model discloses high -efficient permanent magnetism dive mixer that contains antiwind function can stop in energy saving and consumption reduction during fibre class material in the sewage gets into the cavity between mechanical sealing seat and the impeller, the winding of thoroughly stopping mechanical seal to improve dive mixer life.