▎ 摘　　要

NOVELTY - Preparing ecological functional leather comprises wet dyeing and finishing process flow of the wet dyeing and finishing section is: crusting leather tanned with cationic metal tanning agent, rewetting, anionic surface dyeing 1, neutralization 1, anion filling, cation retanning, neutralization 2, anionic filling dyeing, anionic fat liquoring, cation fixation 1, anionic surface dyeing 2, Cation fixation 2, and cation fat liquoring; and anion filling step and the anion filling and dyeing step with a nano-titanium dioxide modifier. USE - The method is useful for preparing ecological functional leather. ADVANTAGE - The method has function of photocatalytic in the leather wet dyeing workshop, removes formaldehyde in the leather. The leather has antibacterial effect.