The invention relates to a cylinder washing machine. A door body is arranged at the front opening of the cylinder washing machine and one side of the door body is connected with a box body of the washing machine in a hinge mode; the door body is of an inner-outer double layer structure and comprises an inner door and an outer door, wherein the inner door is hinged to the box body of the washing machine so as to partially open/ close the front opening of the box body; a notch is formed in the upper part of the inner door and the outer door is hinged to the inner door so as to open/ close the notch in the inner door; the inner door and the outer door are matched together to completely open/ close the front opening of the box body. Usually users can open the inner door to pick up clothes from the washing machine or put clothes into the washing machine; if users want to add clothes or detergent into the washing machine during the laundry process, they only need to open the outer door and add clothes or detergent into the washing machine through the opening in the upper part of the inner door, without the need of draining the water in the washing machine out completely and then opening the doors to add clothes or detergent. Moreover, the inner door and the outer door are connected reliably, look like a whole door body from the outside and bring a good overall feeling to users.