Abstract: A fully-cover shelter frame is adapted for detachably mounting on a primary spectacle frame which includes a frame body for mounting a pair of lenses in position. The frame body includes a primary bridge connected between the two lenses, two side extensions provided at two outer sides of the lenses respectively, and two hinge members extended rearwardly from said side extensions for pivotally coupling a pair of temples respectively. Each of the side extensions has an engaging surface provided thereon. The shelter frame, which supports two auxiliary lenses thereon.