The invention provides a moving type closed belt conveyor with a matched dust collecting system. A roller is arranged at the feeding end of the belt conveyor, the middle lower part of the belt conveyor is arranged on a trolley, a shell is arranged at the upper part of the belt conveyor, a belt and a carrier roller of the belt conveyor are arranged in the shell, a feeding opening is formed in the side, close to the feeding end of the belt conveyor, of the shell, an air suction opening is formed in the top end of the shell, the air suction opening is communicated with a dust collecting air inlet of a pulse dust collector through a hose, and the pulse dust collector is fixed to a truck. According to the moving fully-closed belt conveyor adjustable in height and angle, provided by the invention, air suction equipment is arranged on the belt conveyor, and the air suction equipment sucks light fine impurities and dust and conveys the light fine impurities and dust to the movable pulse dust collector to be collected, so that the purposes of transporting crops and collecting dust are achieved. Both the conveyor and the pulse dust collector are movable, so that the closed belt conveyor can be conveniently used in any occasion and provides convenience for crops bulk transportation.