Abstract: A safety protective cover for socket receptacles includes an upper housing, a sliding base, a first elastic member, a second elastic member, and a lower housing. The upper and lower housings are provided with receptacles, respectively. The sliding base is capable of vertical and horizontal movements between the upper and lower housings, and has elastic restoring forces. The sliding base further has stopping members that can be extended into the receptacles of the housings. When the stopping members of the cover are not simultaneously pushed away from the receptacles, the other stopping member not being pushed away blocks in the receptacle to stop horizontal displacement of the sliding base, thereby prohibiting an alien object from pushing away the stopping member and entering the socket.