Abstract: The study was aimed to evaluate the pharmacokinetics and tissue distribution of forsythiaside liposome in chicks by intravenous administration. The pharmacokinetics of chicks with intravenous administration of forsythiaside liposome and forsythiaside solution 20 mg/kg was studied and the concentrations of forsythiaside in heart, liver, spleen, lung, kidney and plasma were determined by HPLC. The plasma concentration-time curves of forsythiaside liposome and forsythiaside solution were both fit to the two-compartment model and the pharmacokinetic parameters were (1.79±0.050) and （0.11±0.006） h for t_1/2β, (39.95±2.32） and (4.26±0.39) (μg·h)/mL for AUC, (0.56±0.04） and （4.73±0.41） mg/(h·kg) for CLs. Compared with the liposome to the solution, the drug distribution in liver, spleen and lung were obviously elevated. Compared with forsythiaside solution, the forsythiaside liposome could significantly prolong the resident time of forsythiaside in the blood circulating system and could be concentrated at the target tissue rich in the reticuloendothelial system.