A rotary dinnerware washing apparatus includes a housing defining therein a washing chamber, a washing mechanism mounted in the housing for spaying hot water over the washing chamber, and a rotating rack rotatably mounted in the washing chamber, a power drive arranged below the washing chamber for rotating the rotating rack in the washing chamber. The rotating rack has partitions radially suspending in the washing chamber and respectively kept in contact with the peripheral wall of the washing chamber and dividing the washing chamber into multiple separately enclosed zones, for example, two cleaning zones, two buffer zones at two opposite lateral sides of the cleaning zones and one dinnerware access zone between the buffer zones.