The tubular belt conveyor is a special kind of belt conveyor, which can accomplish coveredtransportation, effectively avoiding leakage, spraying materials, dust, rain and snow and preventing debris-mixed intrusion phenomenon from occuring. This conveyor has the advantages of complete enclosure, low environmentalpollution, large-inclination angle for conveying, suitablity for complex topographical arrangements, ease of2D- and 3D-turning, small footprint, and suitablity for bidirectional conveying of material, etc..