The invention discloses a ventilation heat dissipation kiln, comprising a furnace body, wherein a furnace door is arranged in the surface of the furnace body; a fastening handle is arranged in the surface of the furnace door; a control button is arranged on the bottom of the furnace door; a heat insulation layer is arranged in the inner cavity of the furnace body; a heating tube is arranged in theinner wall of the heat insulation layer; a sintering chamber is formed in the inner cavity of the heat insulation layer; supporting rods are arranged on the bottom wall of the sintering chamber; a placing seat is arranged on the top ends of the supporting rods; and a ventilation chamber and a cooling chamber are formed in the bottom of the sintering chamber. According to the ventilation heat dissipation kiln, hot air in the sintering chamber is pumped by a ventilation tube in the top of a connection tube in a first air tube assembly, so that the hot air in the sintering chamber can be exhausted by an exhaust tube; and an air suction tube is used for air suction, external fresh air can enter a cooling box, the air is cooled by a semiconductor chilling plate, and the cooled air is conveyedto the sintering chamber by a ventilation tube in the top of a connection tube in a second air tube assembly, thus accelerating the temperature reducing rate of the sintering chamber, and improving the production efficiency.