An auxiliary support device for flip touch screen includes a main body and an upper cover having a touch panel. The main body is preformed with a cavity for assembling with a base seat. The upper cover is preformed with an elongated recess corresponding to the cavity. A slide rail is assembled in the elongated recess. One end of a link member is movably pivotally connected with an outer end of the base seat. A bottom end of a slide member is movably pivotally connected with an inner end of the base seat. The slide member is assembled in the slide rail. The other end of the link member is slidably connected with of a surface of the slide member. When the upper cover is turned upward, the link member is turned upward with the slide member to obliquely support the upper cover.