The invention discloses a smoke-reuse internal heat type biomass carbonization furnace. The carbonization furnace comprises a carbonization furnace body, and also comprises a combustion chamber arranged in the carbonization furnace, a primary air inlet channel connected with the bottom of the combustion chamber and a filler channel connected with the bottom of the combustion chamber, and a carbonization chamber is formed between the carbonization furnace body and the combustion chamber; and the top of the combustion chamber is connected with the outside of the carbonization furnace body, a cross smoke reuse pipeline is arranged at the lower portion of the combustion chamber, a cross secondary air inlet pipeline is arranged at the upper portion of the combustion chamber, and the outer wall of the combustion chamber is connected with heat conduction sheets. The smoke-reuse internal heat type biomass carbonization furnace has the advantages of simple operation, strong adaptability to a raw material, cheapness and easy obtaining of the raw material, realization of in-situ carbonization treatment of the biomass raw material, transportation and treatment cost reduction, small pollution to the environment, and good application prospect.