pulsators in general the larger diameter of the pulsators and the higher rotation speed of the ribs is helpful to improve the efficiency of the furling laundries increase the lifted height as well as the casting distance of laundries however a higher speed will cause the wear between the pulsators and laundries the pulsators according to the invention have a rotation speed of 10 90 rpm preferably 30 70 rpm and more preferably 45 60 rpm the cross section of pulsators i e the cross section of the pulsator in perpendicular to the rotation shaft of the pulsators has an inclination angle of 10 80 u00b0 with the horizontal plane preferably 40 65 u00b0 and more preferably 55 60 u00b0 the embodiment is an improvement to the solution of the u s pat no 6220063b1 the two slantedly located pulsators are disclosed in the above document which has a big shortcoming in that laundries can roll only on one rolling surface and the conventional drum washing machine also has the same shortcoming another shortcoming is that if a larger amount of laundries are needed to be rolled the pulsator should be made larger and then the diameter of pulsators will be nearly equal to the height of the inner tub according to the above document and the real washing machines consequently if a small.