Abstract: Leakproof period panties for wear at home and during sleep include an outer layer. A leakproof structural layer is sewn on the inner side of the outer layer at the position of the crotch. The leakproof structural layer includes a lining layer. The top edge of the lining layer is sewn into the outer layer. A leakproof layer is sewn on the outer surface of the lining layer. An absorption layer is sewn on the bottom of the leakproof layer at the position of the crotch. The outer layer and the leakproof structural layer of the panties are combined to mimic a fake two-piece style. With the leakproof structural layer including a combination of a comfortable lining layer, an absorption layer for absorbing menstrual flow, and a leakproof layer for preventing seepage and lateral leakage, the period panties can serve as homewear or outerwear, while having an aesthetically attractive appearance.