The invention relates to a bagged tea containing plant flowers, stigma and leaves and a preparation method thereof. The bagged tea is produced by pretreating corn stigma, Cassia occidentalis, chrysanthemum flower, hawthorn and pagodatree flowers and leaves, boiling in water; filtering, collecting supernatant, concentrating, extracting with ethanol, removing ethanol, uniformly spraying the resulting ethanol extract to lotus leaf coarse powder, adding sugar powder 6 times the weight of the drug powder and dextrin double the weight of the drug powder, and stirring thoroughly. The bagged tea has good palatability, convenient use, high therapeutic effect, and hypolipidemic and anti-obesity effects. It is proven that the blood fat level is significantly reduced after taking the bagged tea continuously for 30-40 days, with a dose-effect relationship; and the body weight is remarkably reduced after taking the bagged tea continuously for more than 60 days.