Policy pilot is a unique policy testing and innovation mechanism in China’s governance practice. This policy making mechanism based on the concept of “experiment” is conducive to controlling reform risks，reducing reform costs and improving the success rate of reform. Its governance effect in the economic field is significant，and the problems in public goods/public services are frequent. The pilot project of classification of municipal solid waste in China was launched in 2000. The Implementation plan of classification system of municipal solid waste was issued in 2017. And the compulsory classification of municipal solid waste continued to be implemented in the form of pilot project，which shows that the pilot project of classification of municipal solid waste in the past 17 years has not achieved prospective results. This paper takes the classification of China’s municipal solid waste as an example to explore the limitations of the policy pilot，and considers that the limitations of the policy pilot are related to the following three factors：1. Governance through the way of administrative contract；2. The supply mechanism of the policy pilot does not match the “complex” nature of public products；3. The impact of the pressure system on the policy pilot.