to observe efficacy and safety of Juhong Paste for Phlegm and Cough in treating pediatric acute bronchitis. Methods:96 PAB cases were randomly divided to group of phlegm dampness (GPD, 50) and group of wind cold (GWC, 46). In addition to the usual treatment, the paste was given for a course of one week. White blood (cell) count and its categorization of the peripheral blood were taken before and after treatment. X-ray examination was taken on some cases. Results:of GPD the excellent rate was 72.0% and total effective rate 96.0%. Of GWC the excellent rate was 50.0% and total effective rate 73.9%. GPD was significantly higher than GWC (P<0.05). Conclusion:the paste is markedly effective and safe for cough and phlegm with pediatric acute bronchitis, especially for the type of phlegm dampness. The curative effect for the type of wind cold needs further investigation, and addition of wind cold dispelling formulae is advisable.