Portable supporting device for map surveying and mapping

The utility model discloses a portable supporting device for map surveying and mapping. The device comprises a first bottom plate, a second bottom plate, a fixing assembly, a wall plate, a hinge, a sliding groove, a rolling rod, a baffle, a rolling disc, a rubber plate, a second threaded column, a bottom groove, a second nut sleeve and a connecting shaft. A hinge is fixed at one end of the bottomof the first bottom plate through a screw; a second bottom plate is fixed at the top of the other end of the hinge through a screw; wallboards are fixed to the top of the first bottom plate and the top of the second bottom plate through screws. The utility model discloses a portable supporting device for map surveying and mapping. Simple structure, convenient operation, the first bottom plate andthe second bottom plate can be freely turned over through a hinge; the first clamping plate and the second clamping plate are clamped, free contraction and spreading can be achieved, surveying and mapping use is facilitated, t