(B, ) the utility model relates to a (B, ) (b) many rotors straw rubbing crusher. Many rotors straw rubbing crusher is including supporting positioner, supporting positioner includes the riding wheel seat, install perpendicular riding wheel and horizontal riding wheel on the riding wheel seat respectively, perpendicular riding wheel can be at vertical flat rotation in surface, horizontal riding wheel can be at the horizontal plane internal rotation, hold the revolving tube in the bottom of round flange on the rim top of perpendicular riding wheel, the rim that straw rubbing crusher can adjust the horizontal riding wheel of position messenger of horizontal riding wheel supports the lateral part at the round flange, the revolving tube rotates and to drive the rotation of horizontal riding wheel. Adopt to support can remain stable when positioner makes the revolving tube rotate, the revolving tube is can be all the time rotatory around its self rotation center axis, and beat when having reduced the revolving tube and rotating has improved the stability of revolving tube, reduced in the many rotors straw rubbing crusher work because of the rotatory vibration that produces of revolving tube, reduced noise at work. (B, )