The invention discloses a full-automatic speed reducing clutch for a washing machine, which relates to the technical field of washing machines. The full-automatic speed reducing clutch mainly comprises an input shaft, an output shaft, an output shaft sleeve, an input shaft sleeve, a brake wheel and a dual drive gear mechanism arranged in the brake wheel, wherein the input shaft, the output shaft sleeve and the output shaft are connected with the dual drive gear mechanism; and the brake wheel and the output shaft sleeve are driven reversely and proportionally in two directions, swing and rotate repeatedly, and conduct powerful twisting and swinging oppositely. When the washing machine is in a dewatering condition, the output shaft and the output shaft sleeve can be automatically combined with each other under the locking action of the clutch, and continuously and unidirectionally rotate at a high speed for centrifugal dewatering. The full-automatic speed reducing clutch for the washing machine is simple in structure; the performance of the speed reducing clutch of the conventional washing machine is improved; the structure of a control system is simplified; the noise of the washing machine is reduced; the efficiency of the washing machine is improved; and the service life of the washing machine is prolonged.