Objective To evaluate the clinical efficacy and pharmacoeconomic effect of sequential therapy of azithroycin on treatment of community mycoplasmal pneumonia(MP)in chindren. Methods 522 cases with MP from March 2011 to August 2013 in pediatrics department of our hospital were randomly divided into intravenous-drip group(n=265)and sequential-therapy group(n=287),and both two groups were treated by azithromycin for 5 days.The intravenous-drip group was treated with intravenous drip of azithromycin,and the sequential-therapy group was treated with azithromycin in the way of intravenous drip for 2 days and oral-taken for 3 days.The two treatments were cost-effectiveness analyzed by pharmacoeconomic theory. Results The total efficiency of the sequential-therapy group and intravenous-drip group were 94.0%(249/265)and 92.7%(266/287),respectively.There was no different between the sequential-therapy group and the intravenous-drip group(P<0.05).But the cost in intravenous-drip group was higher than that in sequential-therapy group(P<0.01).The incidence of adverse reaction of the sequential-therapy group and intravenous-drip group were 94.0% 34.7%(92/265)and 26.9%(76/287),respectively.And it was significant different between the two groups(P<0.05). Conclusions The treatment of sequential therapy of azithromycin is safety,effective and economical.And it is worthy to be widely recommended in clinical.