The invention belongs to the technical field of washing machines, and particularly discloses a water saving method of a clothes washing device. The method includes the following steps of preparation,washing of clothes, dewatering of the clothes and rewashing of the clothes. Compared with the prior art, the water saving method has the advantages that on the one hand, the consumption of water for washing the clothes is greatly reduced, so that water resource is saved; on the other hand, the effect of cleaning the clothes is substantially improved, so that the washed clothes are much cleaner.