Pretreatment method of spring mulberry leaves for preparing mulberry leaf tea and mulberry leaf tea

The invention relates to the technical field of preparation of mulberry leaf tea, and discloses a pretreatment method of spring mulberry leaves for preparing the mulberry leaf tea, which comprises the following steps: cutting young shoot branches and leaves without core picking in spring, packaging the young shoot branches and leaves in a transparent bag, opening holes in the transparent bag, placing buds, cores and leaves vertically upwards, storing at 2-5 DEG C for 2-4 days, and alternately keeping darkness and illumination. The photosynthesis and respiration of the mulberry leaves are reasonably controlled by controlling detailed factors such as temperature, illumination and mulberry leaf states, on the basis of keeping the appearance advantages of freshness, tenderness, nutrition, bright green color, smooth and bright leaf surfaces and the like of the mulberry leaves in spring, nutritional ingredients such as DNJ are comprehensively and obviously improved, the natural frost drop mulberry leaf level is bas