Movable water container used for water saving device

The utility model discloses a movable water tank used for water-saving devices and comprising a gearing as well as two water tanks. Wherein, the gearing is fixed on the wall and the two water tanks are connected with the gearing. The tank walls of the two water tanks are respectively provided with a water inlet channel and a water outlet channel. Being as a hand reel, the gearing drives the two water tanks respectively to rise and drop, which changes the prior procedure of only one fixed water tank washing the toilet into the alternate operations of the two water tanks. Thus, not only the operational procedure of washing the toilet is simplified and the used time is shortened, but also the shortcomings that the water tanks are troublesome in fixation and the occupied area is rather large are all avoided. The little occupied area is small and therefore cannot limit the height of the water tanks holding the wastewater, and the two water tanks and the hand reel can be fixed in the proper indoor positions accordi