The utility model discloses an explosion-proof water bag for a coal mine, which comprises a water bag body, wherein a plurality of suspension buckles are arranged on the water bag body; stiffeners are arranged on the two sides along the longitudinal direction of the water bag body; and the suspension buckles are arranged at the positions near below the stiffeners. The explosion-proof water bag has the beneficial effects that the stiffeners are arranged on two sides of a water injection port along the longitudinal direction of the water bag body, so that the water injection port of the water bag body is free from folds, thereby avoiding water overflow from the folds as the water bag is suspended; the water storage capacity of the explosion-proof water bag is ensured; and the explosion-proof effect is improved when a gas and coal-dust explosion accident occurs in a coal mine well.