OBJECTIVE Nowadays, how to prevent and handle sudden public health events has become a popular talk in public health administration. Medical supplies in sudden public health events play a more important role in the study of sudden public health events handling. Fine medical supplies is not only benefit to handle sudden public health events quickly, but has good economic effect. Based on this analysis, we put forward a modularization method for medical supplies in sudden public health events. METHODS: We gathered proceeding related material, and analysed the characteristic of medicine demand and consumption laws. We also studied disease composition of different sudden public health events, severe degree of disease and different parameters of treatment for all kinds of diseases. In accordance with the principle of modularization, adopting system analysis and statistics methods, we designed all kinds of basic modules and the combination methods for these modules under every sudden public health event. First, to divide medical supplies into a certain number of basic modules, then combine these basic modules into different aggregates which compose the medical supplies modules. RESULTS: According to the results of the data collection, we used modularization method and cluster analysis to ascertain the scope of atreatment of basic module. On the basis of these studies, we formed the standard of variety and quantity of basic modules. Then we used modularization combination method to complete the combination of basic modules under different sudden public health events. CONCLUSIONS: When sudden public health events happen, we can work out a supply plan quickly according to kind and severe degree ensuring the timely handling of these events. Additionally, modularization for medical supplies provides a new method to medicine reserve of preventing sudden public health events for us, which must be helpful to save money and resources.