We fabricated CsPbBr 3 nanorods with standard blue emission (462 nm) and a high PLQY of ∼90% with the assistance of supermolecules. The β-CD works as a co-ligand and confine the isotropic growth of the nanocrystals to produce anisotropic nanorods. The strong coordination between β-CD and Pb favors the improvement of the PLQY and stability.