Asymmetry prerotation stator for ship

The invention relates to an asymmetric pre-swirl stator of a boat. To improve the speed performance of a non-large boat with low speed, the invention is provided with the pre-swirl stator applicable to a front part on a propeller at a stern, with reflux characteristics of the boat and rotation direction of the propeller considered; besides, the pre-swirl stator is set with a plurality of asymmetric shapes to evenly load the distribution of the propeller and further improve the efficiency of the propeller and the cavitation characteristics.