A drum washing machine and a spraying system and a sealed window gasket. The drum washing machine includes a box, an outer barrel and an inner barrel that are arranged from outside to inside, the sealed window gasket is arranged between the box and the outer barrel. The spraying system includes a circulating pump, a water retaining structure and water spraying pipes, a water inlet of the circulating pump extends into the outer barrel, and a water outlet of the circulating pump is in communication with the p water spraying pipes; the water spraying pipes are all arranged on the sealed window gasket; and the water retaining structure is arranged inside the sealed window gasket, and the water retaining structure is provided such that washing water sprayed from each water spraying pipe can be scattered and reflected into the inner barrel. Thus, maintenance and installation are simpler.