It is mainly aimed at disposal projects such as agricultural and forestry straw, livestock and poultry manure, municipal sludge, etc. It can be arranged individually or mixed with multiple disposals. It utilizes the characteristics of high organic matter content of the above-mentioned solid waste to achieve carbon-gas co-production. The main products are carbon-based fertilizer and Bio-natural gas can realize efficient resource utilization of waste. Complex manual and mechanical sorting systems for agricultural and forestry waste are no longer needed, which can significantly reduce investment and equipment maintenance costs in the waste treatment process, and significantly reduce labor costs. It can meet the synchronous feeding of dry and wet agricultural and forestry wastes, without the need to separate dry and wet agricultural and forestry wastes, reducing project operation costs and construction costs. The treatment of agricultural and forestry waste leachate will be more cost-effective and will no longer have secondary impacts on the environment. The organic waste is pyrolyzed at medium and high temperatures under air-isolated conditions, and biochar products, fuel oil products and bio-natural gas products are obtained after pyrolysis, thereby achieving harmless and resource-based treatment of agricultural and forestry waste.