A laundry treatment device, comprising: an outer drum (100), a partition drum (200) being fixedly provided or integrally formed within the outer drum (100), an annular cavity being formed between the outer drum (100) and the partition drum (200), and the outer drum (100) and the partition drum (200) each being provided with an individual water inlet and water outlet; a first washing area is formed within the annular cavity, the first washing area being separately fed with water and discharging water by passing through the water inlet and water outlet of the outer drum (100); a second washing area is formed within the partition drum (200); a second laundry treatment member (300) and a first laundry treatment member (400) are provided, and the second laundry treatment member (300) and the first laundry treatment member (400) are provided in the first washing area and the second washing area, respectively, so that washing water does not mix when washing in partitions, thereby meeting the requirement of healthy partitioned washing, thus solving the problems in existing multi-drum washing machines of using multi-drum stacking to increase the volume of a washing machine and not achieving healthy partitioning due to using multiple washing tanks to share washing water.