本发明公开了一种复合生物质粉末辅助分步机械活化回收锂离子电池正极废料的方法。该方法包括：对锂离子电池正极废料进行预处理得到锂离子电池正极活性物质；将正极活性物质与复合生物质粉末混合进行干法机械活化；在干法机械活化后的混合粉末中加入有机酸进行湿法机械活化后直接水浸，得到浸出液和滤渣。本发明采用固体废物‑复合生物质粉末辅助低能耗的机械活化法对锂离子电池正极废料进行回收，整个回收方法绿色、高效、低能耗、无二次污染、工艺流程简单且有价金属浸出率高，符合锂离子电池正极废料处理回收行业产业化应用的要求。

The present invention discloses a method for using composite biomass powder assisted step-by-step mechanical activation to recover cathode waste of lithium-ion batteries. The method includes: pre-processing the cathode waste of a lithium-ion battery to obtain the active substance of the cathode of the lithium-ion battery; Mixing the positive electrode active substance with composite biomass powder for dry mechanical activation; After wet mechanical activation, organic acids are added to the mixed powder after dry mechanical activation, and then it is directly immersed in water to obtain the leaching solution and filter residue. The present invention uses a solid waste composite biomass powder assisted low energy mechanical activation method to recover the positive electrode waste of lithium-ion batteries. The entire recovery method is green, efficient, low energy consumption, no secondary pollution, simple process flow, and high valuable metal leaching rate, which meets the requirements of industrial application of lithium-ion battery positive electrode waste treatment and recovery industry.