In order to completely solve the problem of material clinging and blanking during the use of belt conveyor, through in-depth analysis on the causes and characteristics of materials clinging to belt, a multi-effects coupled removal technology for belts is researched, which is composed of "roller brush-peeling whip-high-pressure air knife", and a multi-effects coupled intelligent cleaning machine for belts is developed, including cleaning system, bulk cargo recovery system and intelligent control system. Based on the simulation and experimental research method, the removal effect of the high-pressure air knife device on the slurry layer is verified, and it is made clear that when the inlet pressure is greater than 0.7 MPa, the spray distance is 5~10 mm, the spray angle is 70°, the nozzle spacing is 4.5 mm, and the high-pressure air knife adopts double-row staggered arrangement, the surface of the belt which has clinging materials on it can obtain a better removal effect during the engineering operation. At present, the multi-effects coupled intelligent cleaning machine for belts has been running on the engineering site for more than 1 year, which can realize the removal rate of clinging materials of more than 90%, and can realize long-term effective anti-sticking and debonding, cleaning and recycling integration and unmanned cleaning process at the same time.