With the increasing variety and complexity of municipal solid waste (MSW), the application of automation technology in waste incineration has become particularly important. The gasification approach for MSW has put forward more requirements for controlling of equipment. This paper proposes a fuzzy control method based on PLC, where sensors are used to collect real-time parameters such as temperature and gas composition during the incineration. The parameters are used in combination with fuzzy algorithms to optimize the gasification process. Fuzzy control rules were established using MATLAB and imported into the PLC. Field experiments were conducted and data were analyzed, showing that the use of fuzzy control enables precise control of exhaust gas concentration. This method provides a more flexible control approach for incineration systems, and improved the efficiency and environmental performance of waste incineration while enhancing the operational stability and emission quality of the incinerator.