Tubular belt conveyor is a special belt conveyor developed based on the trough belt conveyor and can realize enclosed conveyance with effective prevention of leakage and spill of materials, raise dust, mixing of sundries and intrusion of rain and snow, etc. The tubular belt conveyor is characterized good tightness, low environmental pollution; large inclination of conveyance; applicability to complex terrain layout; easiness to realize planar and spatial turning; small floor area; and bidirectional conveyance of materials, etc. As of now many tubular belt conveyors have been designed, manufactured and installed for domestic and abroad customers including Jiangsu Yonggang, Sanya Cement, India Sally Holy Power Plant and Indonesia Project, etc.