The invention provides a multifunctional automatic automobile cover. The multifunctional automatic automobile cover comprises awning cloth, a storage box mounted at an automobile tail, a driving mechanism and a supporting mechanism, wherein the awning cloth is composed of ceiling awning cloth and awning cloth at the two sides; the driving mechanism comprises a motor, a compression spring, a driving wheel and a driven wheel, which are all mounted in the storage box; the supporting mechanism comprises two main frameworks, a plurality of transverse frameworks and two elastic steel sheets in one to one correspondence with the two main frameworks; the two ends of each transverse framework are vertically connected with a radial framework respectively and the radial framework hinged to the tail end of each main framework is a first radial framework; the first radial frameworks are locked through electromagnetic locks mounted on the main frameworks respectively; each elastic steel sheet is composed of a movable section and a fixed section. The multifunctional automatic automobile cover can prevent automobiles parked in the open air from being polluted by sunlight, rain and snow and dust, and also has privacy protection and certain anti-theft effects; the multifunctional automatic automobile cover has the characteristics of simplicity and convenience in operation, compact structure and convenience for detachment.