The invention relates to a range hood with a suction assistance device. The range hood comprises a range hood body and air supply devices mounted on the range hood body, and is characterized in that the air supply devices comprise draught fans; exhaust vents of the draught fans are connected with air ducts; one or more air outlets are arranged on the air duct; and face down or slant down; and accordingly, the air outlets can face a stir pan on a stove, and then at least part of the supplied air flow can be blown into the stir pan. The range hood provided by the invention has the advantages that the supplied air flow can be directly blown into the stir pan, oil smoke can be pushed to gather at an air suction opening of the range hood at the beginning that the oil smoke is generated, and then the overflow of the oil smoke in the rising process can be thoroughly avoided.