The invention relates to a full-automatic decelerating clutch for a washing machine, belonging to the technical field of washing machines, comprising an input shaft, an output shaft, an output shaft housing, an input shaft housing, a brake wheel and a double drive gear mechanism. The invention is characterized in that: the double drive gear mechanism is arranged inside the brake wheel, and the input shaft, the output shaft housing and the output shaft are respectively connected with the double drive gear mechanism; the brake wheel and the output shaft housing are reverse mutually, are dual-way driven in proportion, repeatedly swing and rotate, and rub and swing with a relative strength; under a dehydration working condition, via the locking function of the clutch, the output shaft is automatically combined with the output shaft housing, and simultaneously the output shaft and the output shaft housing continuously rotate with high speed in an unidirectional way, and the centrifugal dehydration is processed. The invention has the advantages of enjoying simple structure, improving the performance of a decelerating clutch for a conventional washing machine, simplifying the structure of control system, reducing the noise of the washing machine and improving the efficacy and the service life of the washing machine.