The invention relates to an all-dimensional planetary ball mill with directly-connected speed reduction motors. The all-dimensional planetary ball mill comprises a rack, a planetary motor, a transmission speed reducer, a transmission shaft, a planetary bearing, a rotating stand, milling tanks, a turning motor, a turning speed reducer, a turning shaft and a turning bearing. The planetary motor is fixed on a fixed frame which is fixed at the lower end of the rack, rotated by 90 degrees and shaped like a Chinese character 'zhong', an output shaft of the transmission speed reducer penetrates through a bottom plate seat at the lower end of the rack to be connected with the bottom end of the transmission shaft, the top end of the transmission shaft penetrates through a regular octagon installation platform to be connected with the rotating stand, the milling tanks are fixed on the rotating stand, a main shaft of the turning motor is connected with an input shaft of the turning speed reducer, an output shaft of the turning speed reducer is connected with one end of the turning shaft, and the other end of the turning shaft is connected with the side end of the rack. According to the all-dimensional planetary ball mill with the directly-connected speed reduction motors, the unique structure and principle of the speed reducers are utilized, original additional tension force and eccentric force are reduced, and meanwhile the size can be decreased; therefore, the effects of reducing abrasion, reducing noise and prolonging the service life are achieved.