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This invention discloses a dishwasher door structure, a dishwasher, and a control method. The door structure includes: a main door with a loading / unloading opening; and a secondary door movably mounted on the main door for opening and closing the loading / unloading opening, forming an integral door structure with the main door when the opening is closed. The door structure also includes a guide structure for guiding washing water or air to the gap between the bottom of the secondary door and the main door for rinsing. This invention, by providing a guide structure to direct washing water or air to the gap between the bottom of the secondary door and the main door, and using water or air for rinsing and cleaning, effectively removes food residue that falls into the gap when the secondary door is opened. This maintains the flexibility and ease of use of the dishwasher door structure while reducing maintenance and cleaning costs, thus improving the user experience.