The nanodrop（H-BLFnd）was prepared by ionic cross-linking method, taking high purity C-glycoside flavonoids of bamboo leaf（H-BLF,the mass fraction of C-glycoside flavonoids was above 90 %）and turnip polysaccharide as raw materials, ε-polylysine as a cross-linking agent, then 8 % (w/v) of γ-cyclodextrin was added to H-BLFnd as protective agent, and nanoparticle (H-BLFnp) was obtained via vacuum freeze drying. The appearance, performance and structural characterization of H-BLFnp were tested through particle size analysis, TEM, UV, FTIR, TG and DSC. Results showed that H-BLFnp is a kind of white powder, smoothly and uniformly, which is of（679±10.2）nm average size, （0.349±0.004）dispersion coefficient and（92.39±0.34）% encapsulation efficiency.