The invention discloses a dewatering balance adjusting method and a dewatering balance adjusting device as well as a washing machine. According to the technical scheme of the invention, a motor is used for weighing, then washing in a roller is layered according to the weight of the washing, a series of rotating speeds are controlled according to the relationship between the centrifugal force and the gravity so as to uniformly distribute the washing of different layers, and finally an eccentricity value is measured for deciding whether dewatering is carried out or not, thereby realizing the full and uniform distribution of washing, reducing the time for uniformly distributing the washing before dewatering and vibration generated during dewatering with the washing machine, and improving the efficiency and effect of uniformly distributing the washing before dewatering.