The invention belongs to conveying machines, and relates to a three-dimensional circular tube conveying belt, which solves the problem that the conventional conveying belt can be only elevated upwards within the range of between 0 and 90 degrees. The three-dimensional circular tube conveying belt is implemented by the following special method: both ends of a bearing belt and a backhaul belt are parallel, and the conveying belt is changed into a tubular shape from a parallel shape by a conveyor rounder, so that conveyed materials are wrapped in a tube hermetically; a roller group or a single roller with a circular shape, a square shape, an oval shape, a U shape, a parallel shape and the like is used to overcome the lateral compression and clamping force which are generated by the accumulation of the materials, so that the conveying belt can make a turn in a three-dimensional direction, namely in any directions of horizontal and vertical surfaces, at an angle of between 0 and 360 degrees; and two to three layers of canvas and tyre fabrics which are prepared from nylon, polyester-nylon, terylene, carbon fibers, basalt fibers, aramid fibers and polysulfonamide by dipping gum or ropes arranged at certain intervals are arranged between upper covering glue and lower covering glue to serve as skeleton layers of the conveying belt, and the skeleton layers of the conveying belt are overlaid with side glue mutually to form the conveying belt. The three-dimensional circular tube conveying belt has the advantages of high strength, flexibility, long service and wide application.