The invention provides a bagged weight-losing and slimming tea. The bagged weight-losing and slimming tea is prepared from, by weight, 15-25 parts of astragalus roots, 10-16 parts of codonopsis pilosula, 10-15 parts of rose, 10-16 parts of honeysuckle, 10-15 parts of sweet-scented osmanthus, 5-9 parts of roselle, 10-18 parts of German chamomile, 8-12 parts of hawthorn fruits, 8-16 parts of lotus leaves, 12-18 parts of cassia seeds, 5-9 parts of dried lemon and 5-9 parts of green tea. The invention further provides a preparation method of the bagged weight-losing and slimming tea. The problem of medicine and tea integration is solved, the medicine exists in the tea, and the bagged tea can be drunk during treatment, is not needed to be decocted, is simple and convenient, can be carried for usage during a business trip or travel and is low in price and good in popularization. The bagged weight-losing and slimming tea is ingenious in collocation, the components are reasonable, and the bagged weight-losing and slimming tea having the effects of benefiting qi, securing the exterior, inducing diuresis, tonifying spleen, relaxing bowels, lowering lipid, improving eyesight, caring the skin, protecting the skin, slimming and reducing fat is provided for people losing weight and slimming for meeting the aesthetic need.