The invention provides a lithium ion battery negative electrode plate and a modification process thereof, wherein the battery negative electrode plate is coated with a layer of metal oxide with a thickness of (1-10) [mu]m, and the metal oxide is one or more of [alpha]-Al2O3, [gamma]- Al2O3, SiO2, Ga2O3, ZrO2, and TiO2. As the metal oxide with bet thermal stability and electrochemical performance is coated on the negative electrode plate of the battery, the environment on the surface of the negative electrode plate of the battery is changed, the growth of lithium dendrite on the surface of thenegative electrode of the battery can be inhibited, and the safety problem of the internal short circuit of the battery caused by the directional growth of the lithium dendrite through the separator is effectively prevented; In addition, the negative plate of the modified battery has good machinability, good compatibility with the current battery process equipment, and can promote large-scale production.