NOVELTY - An air suction type gasification furnace comprises furnace body, furnace supporting leg, furnace bottom, furnace cover, exhaust fan, blower, air chamber and fuel gas cooling chamber; where the furnace body is a hollow cylinder; panel and feed port are arranged on the top of the furnace body; the furnace cover is arranged on the feed port; ash outlet/air inlet is arranged at the bottom of the tapered furnace bottom; a fuel gas output pipe is equipped on the wall at the middle part of the furnace body; an exhaust fan is arranged above the fuel gas output pipe.    USE - The air suction type gasification furnace is useful for households having fuel material such as crop straws, woods and sawdust.    ADVANTAGE - The fuel gas can be continuously produced; the furnace slag is completely incinerated; and the consumption of the furnace burden is lower than that of the existing bottom-blow type gasification furnace.    DETAILED DESCRIPTION - An air suction type gasification furnace comprises furnace body, furnace supporting leg, furnace bottom, furnace cover, exhaust fan, blower, air chamber and fuel gas cooling chamber; where the furnace body is a hollow cylinder; panel and feed port are arranged on the top of the furnace body; the furnace cover is arranged on the feed port; a reverse taper-shaped furnace bottom and a furnace body supporting leg are provided at the bottom of the furnace body; ash outlet/air inlet is arranged at the bottom of the tapered furnace bottom; a fuel gas output pipe is equipped on the wall at the middle part of the furnace body; an exhaust fan is arranged above the fuel gas output pipe; the output end of the exhaust fan is connected to the additionally-collocated fuel gas cooling chamber through a fuel gas transmission pipe; the gas output pipe of the fuel gas cooling chamber is connected to the gas cooker of the user through the fuel gas valve.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of an air suction type gasification furnace.