Abstract: A method for producing syngas from a biomass-CO2 coupled converter smelting process is provided, including: initiating smelting in a converter by injecting a primary injection gas while simultaneously injecting biomass and a carrier gas; 5-90 seconds after the smelting begins, increasing an injection flow rate of the primary injection gas from 60% to 100% of a designed flow rate, and keeping injecting the carrier gas at the designed flow rate; when an oxygen concentration in the syngas drops to ?1%, injecting the biomass at the designed flow rate; in a mid-decarburization period: reducing the injection flow rate of the primary injection gas, and increasing the injection flow rate of the biomass to a maximum value; after a peak decarburization phase: increasing the injection flow rate of the primary injection gas, and decreasing the injection flow rates of the biomass and the carrier gas.