The invention relates to a range hood with an external draught fan, and particularly relates to a range hood suitable for household use. The range hood comprises a draught fan (1), a flange (2), an air duct (3), a spray nozzle (4), a jet pipe (5), a soft pipe flue (6), a flue (7) and a hood (8). The draught fan (1) takes in fresh air; air flow blown by the draught fan (1) passes through the air duct (3), enters the spray nozzle (4) and is sprayed out at a high speed; a negative pressure is formed in the jet pipe (5); oil fume in a kitchen is sucked into the hood (8); the oil fume passes through the flue (7) and the soft pipe flue (6); and the oil fume is sucked in by the jet pipe (5) and is sprayed out together with the jet stream. The range hood with the external draught fan is advantageous in that the draught fan takes in the fresh air, blades of the draught fan can be kept clean, and the range hood is in no need of cleaning, and is convenint for use.