Abstract: Solid wastes co-processing using cement kilns becomes an effective way in building a resource-saving and eco friendly city． As a new technology，it combines the advantages of cement production and waste disposal together，and plays a important role in dealing with municipal waste． This article compares the difference of the co-processing status between China and Japan． It shows that China still have a long way to go in the field of waste category being co-processed，the substitute fuel level，regulations established and the government managerial system． According to the actual situation of China，some reasonable suggestions are put forward，such as promoting the development of concerning technologies，putting more emphasis on scientific research，improving the managerial system，etc．