Comprehensive utilization method of oil-tea camellia shells

The invention discloses a comprehensive utilization method of oil-tea camellia shells. The method comprises the following steps: crushing oil-tea camellia shells, performing alkaline pretreatment, and performing solid-liquid separation to obtain black liquor and solid residues; performing enzymolysis on the solid residues through cellulase to prepare monosaccharide and performing alcohol fermentation, and preparing ethanol; regulating pH of the black liquor, and performing solid-liquid separation to obtain residues and a vanillic aldehyde solution; and performing enzymolysis on the residues through xylanase to prepare an xylooligosaccharide solution and residues, and oxidizing the residues to prepare the vanillic aldehyde. According to the comprehensive utilization method, the solid residues obtained by solid-liquid separation are hydrolyzed by cellulase and further fermented to prepare fuel ethanol by using the condition that the oil-tea camellia shells are pretreated by sodium hydroxide; the black liquor ob