NOVELTY - Production of sponge iron using biomass coke comprises placing biomass in furnace gas circulation, heating to obtain biomass coke direct reduction of iron oxide; mixing iron oxide and biomass char, biomass coke producing sponge iron at 1150-1250 degrees C, heat preserving for 40-70 minutes, adding calcium carbonate as fluxing agent to reduce temperature and promote reduction; and adopting two-section grinding.    USE - Method for producing sponge iron using biomass coke (claimed).    ADVANTAGE - The biomass char yield is 22-32%, fixed carbon content is 70-85%, and ash content is 0.8-2.0%. The sponge iron grade reaches more than 90%, and recovery rate is more than 85%. The method reduces nitrogen, sulfur, and carbon dioxide emissions.    DETAILED DESCRIPTION - Production of sponge iron using biomass coke comprises:    (A) placing biomass in furnace gas circulation, heating to 450-650 degrees C, keeping constant temperature for 30-70 minutes to obtain biomass coke direct reduction of iron oxide; where biomass is corn straw, pine sawdust, leaves, and waste paper;    (B) mixing iron oxide and biomass char, where biomass char is 15-30 wt.% of iron oxide, biomass coke producing sponge iron at 1150-1250 degrees C, heat preserving for 40-70 minutes, adding 10-20 wt.% calcium carbonate as fluxing agent to reduce temperature and promote reduction; where iron oxide comprises sulfuric acid cinder, magnetic iron ore, limonite, and hematite; and    (C) reduction product adopting two-section grinding, where first section fineness is 70-80% - 0.074 mm, and second section fineness is 85-90% - 0.043 mm, and two sections magnetic field strength is 70-100 kA/m.    An INDEPENDENT CLAIM is included for biomass coke device comprising turning plate (1), feeding port (2), air inlet (3), air outlet (4), hearth (5), furnace body (6), knob (7), and discharging port (8).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of biomass coke device.    Turning plate (1)    Feeding port (2)    Air inlet (3)    Air outlet (4)    Hearth (5)    Furnace body (6)    Knob (7)    Discharging port (8)