Abstract: Disclosed is an inflatable multi-air-bag cover for cars, consisting of a plurality of air bags which have two downward bent and extended sides and are parallelly arranged and connected by heat-seal to form a hood-like cover. Via an air tube passing through the heat-sealed portion of the air bags and pressure valves disposed within the heat-sealed portions, air is sent into the air bags to sequentially inflate the same. The inflated air bags together form the expanded hood-like cover to cover the roof and doors of the car while the cover can be used as a dust cover and a heat insulation. Moreover, the cover can be conveniently inflated and deflated with little or no effort of the user.