The invention discloses an automatic-rolling washing ball. The automatic-rolling washing ball comprises a hollow shell, a carrier plate, a driving unit, an abutting-against mechanism and a battery arearranged in the shell, the carrier plate is supported by the driving unit and the abutting-against mechanism, the driving unit is arranged below the carrier plate and comprises two driving motor andtwo driving wheels, the two driving motor are connected with the two driving wheels respectively, the abutting-against mechanism is arranged above the carrier plate, the lower end of the abutting-against mechanism is connected with the carrier plate, the upper end of the abutting-against mechanism abuts against the inner surface of the shell and provides tension to force the two driving wheels through the carrier plate to abut against the inner surface of the shell, the battery is electrically connected with each driving motor, and a rugged rubbing part is formed on the outer surface of the shell. During usage, the washing ball and clothes are placed into water together, the washing ball is driven by the driving unit to automatically roll in the water to rub with the clothes, accordingly,the clothes are cleaned, and the automatic-rolling washing ball can be independently used, is not limited to occasions during usage, and is intelligent, small and convenient to carry and use when a user is on business.