The invention relates to a transfer case annular gear shaft, a manufacturing method thereof, and a device comprising the transfer case annular gear shaft. The annular gear shaft comprises an annular shaft wall, and the shaft wall defines a hollow inner cavity; the inner cavity penetrates through the entire gear shaft in the axial direction and extends; and hollowed-out parts are formed on the shaft wall. According to the transfer case annular gear shaft, lightweight of a product is achieved, lightweight of an entire vehicle is achieved, a machining region is decreased, production efficiency ofmachining is improved, production cost of the product is reduced, labor intensity is reduced, and the productivity is increased.