The utility model discloses a variable volume shuttle kiln, and comprises a kiln end. The utility model is characterized in that the top of the kiln body is fixed with anchorage fittings and nuts; the inner wall of the furnace body is provided with inner liner; rails of the utility model consist of a kiln body rail, a kiln head rail, a kiln car rail, an inner rail and an outer rail. A pair of wheels arranged on the kiln head rail are provided at the bottom of the kiln head; the kiln car is laid with high alumina bricks; a slab is provided on the upper part of the kiln car; wheels of the kiln car are arranged at the bottom. The kiln body consists of a front kiln body; the front kiln body is permanently connected with a kiln head; or the kiln body consists of the front kiln body and a medium kiln body of the same structure, the front kiln body is permanently connected with the kiln head, and the medium kiln body is a movable kiln body. Regarding the utility mode, number of kiln bodies can be decided according to required output and varieties of products; the volume of the kiln can be adjusted; the structure is simple; the utility model is handy; fuel consumption is reduced; the utility model is convenient for construction of the kiln and the business cost is reduced.