6,8-disubstituted quinoline compound or pharmaceutically acceptable salt thereof, preparation method therefor, and uses thereof

A 6,8-disubstituted quinoline compound having a structure represented by formula I or a pharmaceutically acceptable salt thereof, a preparation method therefor, and uses thereof in treating Alzheimer's disease. This compound has acetylcholinesterase activity inhibition and Aβ aggregation inhibition capabilities, and hydrolysis products of the compound have metal ion chelation effect.