The study will enroll 240 Pediatric bronchitis volunteers, who will be randomized into 2 groups (1:1 ratio): volunteers from the first group will receive Routine treatment for pediatric bronchitis and Xiyanping injection; volunteers from the second group will receive Routine treatment for pediatric bronchitis. Xiyanping injection will be administration as intravenous injection of 0.2-0.4mL/kg/day once daily for 5 days concomitantly with Routine treatment for pediatric bronchitis