Preparation method of sweet-scented osmanthus black tea

The invention relates to the field of tea production, and discloses a preparation method of sweet osmanthus black tea, which comprises the steps of tea garden management and protection, interplanting of sweet osmanthus trees and tea trees, photovoltaic shading, and taking flower residues, soybean residues, cattle and sheep manure as a base fertilizer; treating sweet-scented osmanthus, performing gradient vacuum freeze-drying to obtain freeze-dried sweet-scented osmanthus, and combining various sweet-scented osmanthus according to an optimal ratio; the preparation method comprises the following steps: processing black tea, performing intermittent red and yellow light withering and fresh-leaf sweet osmanthus laminated withering, performing ultrasonic crushing on withered leaves, adding freeze-dried sweet osmanthus, performing low-humidity high-temperature short-time rolling, adding naturally extracted sweet osmanthus essential oil, performing temperature and humidity controlled rolling fermentation, performing