▎ 摘　　要

NOVELTY - Preparing anode material, comprises under airtight conditions, drying Prussian blue material, performing first mixed treatment with carbon dioxide at a pressure of 50-200KPa for 30-240 minutes at a temperature of 20-30℃. USE - The method for preparing anode material useful in anode pole piece of sodium ion battery and/or lithium ion battery (all claimed). ADVANTAGE - The method enables preparation of anode material with excellent quality and reduced water absorption performance, and improved coulomb efficiency of the battery, reversible capacity, circulation performance of the sodium ion battery, and reduced probability of battery flatulent, and without the need of complex instrument device, low preparation cost, low hygroscopicity of the anode pole piece, and good quality. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: anode material, obtained by the method as mentioned above; and preparing anode pole piece; and odium ion battery and/or lithium ion battery.