The invention discloses a dehydrating barrel stopping mechanism used for a washing machine and the washing machine. The dehydrating barrel stopping mechanism used for the washing machine comprises a first stopping structure, a second stopping structure, a first gear set and a first driving device; the first stopping structure is suitable for being arranged on a dehydrating barrel of the washing machine, the second stopping structure comprises a stopping bar which can move between a stopping position and a releasing position, the stopping bar stops on the side of the first stopping structure along the periphery of the dehydrating barrel when in the stopping position and allows the first stopping structure to cross the stopping bar along the periphery of the dehydrating barrel when in the releasing position, the first gear set is in transmission connection with the stopping bar, the first driving device is in transmission connection with the first gear set and drives the stopping bar tomove between the stopping position and the releasing position through the first gear set. According to the dehydrating barrel stopping mechanism used for the washing machine, rotation of the dehydrating barrel can be stopped, and the stopping effect is stable and reliable.