Abstract: Direct deposing of waste in waste incinerators dose not only produce serious pollution to the environment,but also lead to a great consumption of useful material resource.To realize full combustion of the waste,it is needed to analyze the system characteristics of combustion procedure and simulate the given incinerator.The paper made some simplified suggestions for feeding components of incinerator by which the waste was thought as a combination of water,simplified dust and simplified combustion material.Then heat balance and mass balance were checked,and the dynamic relation between working furnace temperature,oxygen content,furnace negative-preswe,input flow of the waste,air flow of entrance funs and the velocity of dust output was analyzed.In this way,the system characteristics of the waste incinerator were analyzed.A real case of an environment protection cooperation was considered,and the result showed that the working temperature of the hearth through simplified calculation is the same as an actual one and the simplified suggestions can be used to direct the system design and optimal operation.