A supported slide safety member. A slide block disposed on the inner side of an upper cover of a socket, includes two inclined surfaces in the same direction disposed on the outer side of the slide block with a slide block window respectively disposed on a lower side of each inclined surface, and a protruding supporting shaft disposed on the inner side of the slide block. A cover plate with two cover windows is disposed on the inner side of the slide block, and the outer side of the cover plate is in contact with the supporting shaft. An elastic component is connected between the slide block and the upper cover. A stop surface is disposed on both the inner side and the outer side of a tail end of the slide block, stopped by and upper stop rib and a lower stop rib.