▎ 摘　　要

NOVELTY - A three-dimensional microporous aluminum foil includes multiple micropores, where the edge of micropore is provided with burrs. USE - Three-dimensional micro-porous aluminum foil for anode of lithium ion battery used in electric device (all claimed) e.g. electric vehicle. ADVANTAGE - The three-dimensional microporous aluminum foil improves the battery multiplying power performance and cycle performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1. preparation method of three-dimensional microporous aluminum foil, which involves utilizing punching mold to punch aluminum foil raw material to obtain three-dimensional micro-porous aluminum foil; 2. lithium-ion battery anode, which includes three-dimensional micro-porous aluminum foil and the anode material set on the surface of three-dimensional micro-porous aluminum foil; 3. preparation method of lithium-ion battery anode, which involves coating anode material on the surface of three-dimensional micro-porous aluminum foil, and post processing; and 4. preparation method of lithium-ion battery, which involves assembling lithium-ion battery anode, lithium-ion battery cathode, diaphragm and casing by winding or lamination method, and post-processing, where the casing is aluminum casing, steel casing, plastic casing or aluminum plastic film package.