Abstract: County-level domestic waste in China has the characteristics of small and scattered removal and transportation, and a large amount of rural solid waste has not been effectively disposed of. With the support of the state, the sharing of incineration treatment capacity and energy substitution have become an inevitable trend of treatment and disposal. At the same time, the county-level incineration market policy is improving, and the market gap is large with promising prospects, so it is urgent to explore the technical and economic feasibility of county-level incineration co-disposal of rural solid waste. This study took a 300 t/d county small-scale waste-to-energy power plant as the object and, based on three types of factors including rural solid waste (sludge, straw, livestock and poultry manure), domestic waste to rural solid waste ratio (95%∶5%, 90%∶10%, 85%∶15%, 80%∶20%) and incineration waste heat utilization (waste heat power generation, direct heating, steam supply, hot water sales, heat and power cogeneration), constructed 60 circular economy model scenarios of domestic waste incineration co-disposal of rural solid waste. The results showed that when the 300 t/d small waste incineration facility was used to co-dispose rural solid waste, with the domestic waste to rural solid waste ratio of 80%∶20%-95%∶5%, the adoption of steam external supply and cogeneration could achieve higher income. In addition, countermeasures and suggestions were put forward in aspects such as diversified application of technology, localization of equipment, conducting pilot demonstrations, constructing smart platform, and policy and financial support, in order to promote the development of pilot small-scale incineration facilities in counties.