Abstract: Bamboo char is derived from bamboo through high-temperature pyrolysis，and is usually used as a material for combustion，adsorption，and electrodes.Its unique porous morphology，high specific surface area，excellent elasticity and strength in mechanical properties make it has great application potential in reinforcement materials.Preparation methods，basic characteristics and surface modification of bamboo char were combed.Research progress of bamboo char as a reinforcement in polyester composites（especially polylactic acid）were introduced.Specific problems and deficiencies of bamboo char from aspect of preparation，modification to application were analyzed.Based on this，some suggestions for further research of bamboo char were raised in order to provide reference for adding its high-value utilization.