The utility model provides a novel steadily rub cotton machine, fix including switch board, support frame, pay -off track and slip carriage on the pay -off track, wherein every end of carriage passesthrough the cylinder and carries the platen to be connected fixedly, wherein the bottom of carriage be equipped with with the response piece that limit switch on the pay -off track fitted mutually, the top of support frame is equipped with the infinitely variable speed motor, wherein the output shaft of infinitely variable speed motor and partially core rod is connected and fixes, wherein inclinedto one side core rod's one end is passed through the eccentric disc and is fixed with fixed cover connection, fixed apron is fixed on tormenting the template, it is equipped with the spacing elasticband of a plurality of in the template in proper order to torment, wherein the every end in bottom that torments the template is equipped with the stroke pulley, wherein carry be equipped with on theplaten with the cooperation chamber of stroke pulley looks adaptation. The utility model relates to a time is removed dust, can improve and rub cotton fineness, the processingquality that guarantees to torment and the sanitary safety in workshop.