Medical waste from incineration plant in Chengdu City was separately collected by two-stage sampling and random sampling, and all the samples were divided into seven parts. A more practical measured method developed by energy-saving technology service center of Chengdu City was used to estimate the calorific value, and the classification, components, characteristics and caloric value of medical waste was also discussed. The conclusion that medical waste has higher calorific value and volatile matter and high concentration of water was given. And some suggestions are also given, such as high temperature incineration is the proposed technique to disposal medical waste. It put forward higher requirements for the system's performance of high temperature incinerator in the future research and development according to its characteristics.