This utility model discloses a keyboard protective cover device, comprising: a first plate; a second plate flexibly connected to one side of the first plate; a keyboard module disposed on the first plate, and a positioning groove and a receiving cavity disposed on one side of the first plate located from the keyboard module; an attachment portion flexibly disposed on the side of the second plate away from the first plate, the attachment portion being connected to an electronic device; in the stored state, the second plate is disposed in the receiving cavity, and the electronic device is brought into contact with the first plate and closed through the attachment portion, thus protecting the screen and keyboard module of the electronic device; in the supported state, multiple sections of the second plate are moved out of the receiving cavity, so that the attachment portion abuts against the positioning groove, forming a support structure to support the electronic device; the second plate is folded and adsorbed into the receiving cavity, the thickness of the second plate just fills the receiving cavity of the first plate, so that the inner and outer surfaces of the first plate remain flat, without discontinuities or steps, and the second plate does not increase the thickness of the first plate, reducing the weight by 30%, making it convenient for daily use and carrying.
