The invention discloses a preparation method of
black tea. The preparation method comprises the following steps of picking fresh tea leaves with single bugs, or with one
bud and one leaf, and spreading the picked fresh tea leaves in a withering tank for withering; performing rocking for 2-3 times, and rolling the tea leaves after rocking for 30-90 min; performing
fermentation, wherein the
fermentation process is divided into 2-3 steps; performing fermenting for the first time: placing tea leaves rolled in the step 3 in a screen mesh
fermentation tank, and performing fermentation under the condition that the temperature is 28-35 DEG C and the
humidity is greater than or equal to 92%; keeping the fermentation time for 4-7 hours; after fermentation, taking out the tea leaves, and performing
drying for the first time under the condition of 25-32 DEG C; taking out the tea leaves, performing fermentation for the second time, performing covering with a humid pure cotton
yarn to form two
layers, and performing fermentation under the condition that the temperature is 25-36 DEG C and the
humidity is greater than or equal to 95% for 3-7 hours; after fermentation for the second time, performing direct
drying or enabling
moisture to dissipate for the second time, and performing fermentation for the third time; and finally, taking out the tea leaves, and putting the taken tea leaves on the screen mesh tank for
drying, so that the finished products of the
black tea of which the water ratio is 4-7% can be obtained. According to the preparation method of the
black tea, a fermentation technology is adopted for three times, so that the black tea is delicately-fragrant, mellow and good in quality.