By capturing and converting carbon dioxide into energy storage materials, lithium carbon dioxide battery can reduce carbon dioxide emissions and serve as an innovative energy storage device, which has attracted extensive attention from researchers. However, the current lithium carbon dioxide battery still has a low discharge capacity, poor cycle performance and other shortcomings. In this paper, a non-binder self-supporting cathode material for lithium carbon dioxide battery was prepared by carbonizing natural pine wood, the discharge capacity (4.12 mAh?cm-2) and cycle performance (55 laps) of lithium carbon dioxide battery are greatly improved thanks to the multi-channel characteristics and self-supporting structure of biomass derived carbon. This method of using carbon derived from natural biomass as self-supporting cathode provides a new idea for improving the performance of lithium carbon dioxide batteries.