Studies have shown that forsythia suspensa fruit mainly contains forsythin, forsythin, arctiin, forsythol, saponins, oleanolic acid, ursolic acid, betulinic acid and so on. Stearic acid, palmitic acid and β -sitosterol were also separated from the ethanol extract of forsythia suspensa. Pharmacological research shows that the concentrated decoction of Forsythia suspensa has antibacterial effect in vitro, and it is a broad-spectrum antibacterial agent, which can inhibit typhoid Bacillus, paratyphoid Bacillus, Escherichia coli, Shigella dysenteriae, Yersinia pestis, diphtheria Bacillus, Vibrio cholerae, Staphylococcus aureus, Streptococcus and so on. For example, intravenous injection of compound forsythia suspensa injection has high curative effect on epidemic cerebrospinal meningitis; Forsythia suspensa has antipyretic effect, which can significantly reduce the temperature rise caused by intravenous injection of hay extract in rabbits. Compound Forsythia suspensa injection has obvious anti-inflammatory effect on granuloma cyst of croton oil in rats. In addition, Forsythia suspensa also has the effects of strengthening the heart, diuresis, antiemesis, anti-liver injury and anti-tumor. Forsythia suspensa is commonly used in clinic to treat acute nephritis, epilepsy, scrofula, carbuncle, sore, fever, upset, urinary tract infection and so on. Forsythia is slightly cold and bitter; The fruit contains phillyrin, phillyrin, etc. The seeds contain triterpenoid saponins, the branches and leaves contain forsythin and ursolic acid, and the flowers contain rutin, which has the functions of clearing away heat and toxic materials, resolving hard mass, relieving swelling, strengthening the heart and promoting diuresis; Can be used for treating wind-heat common cold, urinary tract infection, carbuncle, swelling, sore, breast carbuncle, lymph node tuberculosis, hyperpyrexia, polydipsia, and urinary incontinence due to heat stranguria.