The invention discloses a convection type rectifying edge air suction lampblack removal mode, and belongs to the technical field of household appliance products. Due to popularization of modern household air conditioning equipment, a closed space is formed in the household environment. In the use process of a range hood, indoor air and outdoor air cannot achieve convection, the air pressure difference is increased, the sucking rate is lowered, and the lampblack removal efficiency is reduced. Due to the structural factor of the range hood, turbulent flow appears in the process that lampblack gas enters a suction opening, the lampblack gas overflows, and the lampblack removal efficiency is influenced. According to the mode, an air inlet channel is additionally arranged on the range hood, the outdoor air is introduced into a room, the range hood has the convection condition, the indoor air conditioning environment is protected, and smooth smoke exhausting conditions are provided. Based on the aerodynamics principle, it is designed that an air curtain is formed on the periphery of the range hood through the introduced outdoor air, and lampblack overflowing is avoided. The structure of the range hood is optimized. Rising smoke is guided into the suction opening in the edge of the range hood through a global fairing, it is guaranteed that lampblack gas generated in the cooking process can be completely exhausted, and therefore the lampshade removal function is improved.