Clothes treatment equipment and outer tub modules thereof

The invention relates to the technical field of clothes treatment equipment, and particularly to clothes treatment equipment and outer tub modules thereof. Each of the outer tub modules is provided with a first end and a second end arranged in opposite axially; a positioning unit is arranged at the first end; the positioning unit of one outer tub module is matched with the second end of the otherouter tub module to prevent the adjacent outer tub modules from moving relatively. Particularly, each positioning unit limits radial movement and axial movement of the second end through a first positioning structure, so that radial fixing and axial fixing of the two adjacent outer tubs is realized; meanwhile, the positioning unit limits circumferential movement of the second end through a secondpositioning structure, so that circumference fixing of the two adjacent outer tub modules is realized. Therefore, the outer tub modules stacked axially cannot topple or fall due to relative movement of the adjacent outer tub m