The invention provides a humidity-sensitive allochroic anti-counterfeiting functional material which comprises a photon crystal and a component B, wherein the photon crystal and component B form a component-B-base liquogel system; the photon crystal is a component A which is distributed in the component B in a periodic dot matrix mode in the form of particles; and the volume changes as the humidity of the component B changes. The particles in the component A are distributed in a dot matrix mode to form the three-dimensional photon crystal, thereby displaying the specific color; the component B has the swelling characteristic, and the volume changes as the humidity changes; and therefore, the dot matrix period parameters of the photon crystal formed by the component A can change as the swelling characteristic of the component B changes, so the defined wavelength can change, thereby displaying different colors and further implementing the anti-counterfeiting function. The color of the humidity-sensitive allochroic anti-counterfeiting functional material is determined by the dot matrix period parameters of the photon crystal formed by the component A, and thus, the material has high reliability and can not be easily imitated.