In order to collect tobacco flowers cut off, an intelligent tobacco topping machine with clamping belt was designed. It was mainly composed of a high ground clearance chassis, an intelligent topping device with clamping belt and a collecting device. The high ground clearance chassis used four-wheel drive and steering technology, and it had advantages of good through performance and high stability. The intelligent topping device was made up of an image recognition and control system of tobacco height, a lifting mechanism, a belt clamping mechanism, a cutting mechanism, a blade disinfection system and a restrain-germinating spraying system. Tobacco height recognition, topping height adjustment, tobacco flower gathering, clamping and cutting, blade disinfection, restrain-germinating spraying and other joint operations can be achieved by this intelligent topping device. This device had advantages of compact structure, full function and high intelligence. Belt conveyor was installed below the bottom of topping device, and tobacco flowers cut off was transported to the collection basket. In order to reduce the drive torque of electric lifting motor, a counterweight was used to balance the topping mechanism, and 64% energy can be saved. Experimental results indicated that topping accuracy rate was about 95%, collecting accuracy rate was about 98%, and it can meet the production requirements.