Temperature-controllable biomass burner

The invention discloses a temperature-controllable biomass burner, which comprises a shell, a fire tube, a fire mouth at the end of the fire tube, a fire grate, a combustion chamber at the upper part of the fire grate, an ash chamber at the lower part of the fire grate, an ash discharge port at the bottom of the ash chamber, a feeding system which is connected with the combustion chamber, an explosion-proof port which is installed at the top of the combustion chamber, an air distribution and ignition system which is connected with the fire grate, an access door which is arranged below the shell, and a control system which is installed outside the shell. By adopting the method, the temperature-controllable biomass burner provided by the invention has the advantages that the temperature of the fire mouth of the combustion chamber can be controlled, and not only can the influence caused by too low temperature be avoided, but also the damage caused by too high temperature to equipment can be avoided.