The invention relates to a propping device, in particular to a proper comprising an overlong rotary
handle and an overlong main body shell and having a special application function. The propping device consists of a base module and a propping module, and specifically comprises 33 components of a lower end cover, a bottom plate, an inner
gasket, an inner end cover, a shell seat, a sliding bearing, an upper end cover, an outer
gasket, an outer end cover, a bottom plate bolt
gasket, a six-arris top column, a lower rolling bearing, a reversing screw tube, an upper rolling bearing, a top column limiting retaining disc, a top seat, a
handle fastening nut, a
handle, a handle turntable, an outer rolling bearing, a handle connecting rod, an inner rolling bearing, a
bevel gear, a gear shaft pin and the like. The propping device overcomes the defects of more optional equipment, large occupied space, narrow
adaptation range and the like in the conventional well-known propping device, and has the characteristics of simple and strong structure, convenience for use, overlong
stroke, wide adaptability and the like; moreover, the propping device disclosed by the invention is simply implemented and easily manufactured, is attractive, decent,
solid and durable, and has a wide market space and a high economic added value.