Anti-counterfeiting is closely related to national security

social harmony and economic stability. Among them

perovskite quantum dots（QDs） have been widely used due to their high fluorescence quantum efficiency and adjustable light wavelength

but their poor stability is not conducive to anti-counterfeiting applications. The research progress of improving carrier transport characteristics and stability of metal halide perovskite QDs was systematically introduced. Considering the influencing factors of perovskite QDs stability

the main strategies to improve it

such as modifying hydrophobic ligands

building semiconductor heterojunction/perovskite QDs

coating polymer

and developing non-lead inorganic components were summarized. Further

it could provide reference for the development of stable and efficient fluorescence anti-counter feiting materials.