The invention discloses a method for preparing willow leaf tea. The method comprises the following steps: processing willow, processing willow leaves, picking the willow leaves, rinsing, carrying out fixation, rolling, drying, and packaging. The method disclosed by the invention has the advantages that the willow is processed by adopting a herbaceous plant solution and a fertilizer, so that the willow can rapidly grow in a short time, the growth of the willow leaves is promoted, and nutritional ingredients inside the willow leaves can be more stable and are hardly lost during post treatment; the willow leaves are sprayed with nutrient solution before being picked, so that the willow leaves absorb protein ingredient and other nutritional ingredients in the nutrient solution; traditional Chinese medicine ingredients are added, so that the nutritional ingredients in the willow leaves and the nutritional ingredients in the nutrient solution can be better fused and supplement each other in effect, the taste of the willow leaves can be effectively improved, and the willow leaf tea is smooth, fragrant and sweet in taste and has the effects of processing bronchitis, irregular menstruation, sore throat, lumbar muscle strain, arthralgia and obesity.