The present invention relates to crop stalk pyrolyzing and carbonizing treatment apparatus based on pyrolysis technology, and is especially one biomass energy converting furnace, which includes one reactor driving unit, one dome kiln type heating furnace, one rotary reactor, one spiral feeder, one combustible gas recovering and utilizing unit, one dust treating unit, one automatic control and display unit and one spiral discharging unit. Under the control of the automatic control and display unit, the biomass energy converting furnace can complete the jobs from material feeding, producing anddischarging continuously.