Objective To investigate and compare the demands of dosage forms and specifications of essential medicine for children in different levels of medical institutions, so as to provide references for selection of essential medicines for children by levels of medical institutions. Methods In 13 provinces or municipalities, 104 medical institutions, including tertiary, secondary and primacy medical institutions, were investigated by questionnaires. Kinds of drugs, dosage forms, requirement types and requirement levels of drugs were analyzed and compared in different levels of medical institutions. Results Tertiary medical institutions had higher demands than other levels of medical institutions for the number of drugs types, dosage forms and level of demand on each drug (P < 0.05), secondary medical institutions were higher than primacy medical institutions (P < 0.05), but community health service centers were the same as township health centers. Conclusion The demands of dosage forms and specifications of essential medicine for children in different levels of medical institutions are different. So future studies should develop the essential medicines list for children depend on different levels of care.