An anti-overflow device at a drum water injection port for a drum washing machine comprises a water flow baffle. The water flow baffle extends along an outer drum to an inner drum and is installed at the water injection port, and water flow is blocked to run back into the water injection port along with the inner drum at a high speed. The anti-overflow device further comprises a blocking rib, and the blocking rib is arranged on the inner side of the water injection port and close to the outer drum. The drum washing machine comprises the anti-overflow device at the drum water injection port. The principle of fluid mechanics is adopted in the anti-overflow device at the drum water injection port, the change of liquid flow in the drum is realized, and the anti-overflow effect is good.