An up-draft biomass particle gasification furnace comprises a feeding mechanism, a main body of the gasification furnace and an air supply mechanism; an air outlet is formed at the upper part of the main body of the gasification furnace, and the main body of the gasification furnace comprises an upper hearth, a furnace grate and an ash bin; an air outlet of the air supply mechanism is communicated with the ash bin through an air pipe; a water jacket is arranged in the wall body at the lower part of the hearth; and the top part of the water jacket is communicated with the air pipe of the air supply mechanism through a steam pipe. The utility model can achieve the purposes of continuous charging, gas-producing and operation, can operate on an oil/gas fired boiler so as to be substituted for expensive fuel oil and fuel gas, and has better economical efficiency. The biomass energy belongs to the renewable energy sources and is of great significance for relieving the problem of energy depletion; rich biomass resources can be utilized to be converted into biomass fuel gas, and the utilization ratio of the biomass resources is high.