Abstract: Based on the kinetics principle of anaerobic fermentation, the new patent—the fermentative equipment of marsh gas with bioenergy pneumat-agitation was invented. This equipment assembled the new techniques of pneumat-agitation, automatic backflow and fixed of bacterium, automatic breaking shell and clearing residue, two-step ferment and automatic heating with solar energy, eliminating blind spot of ferment and short circuit of material liquid, and made optimization and matching. Using successive ferment technology of dynamic state, it solved the technical problems existing in the fermentative equipment of marsh gas with unsuccessive ferment technology of static state. The actual tests in the loess plateau area of northwest show: the year average production of marsh gas increased by 31% to 72.4%, and it can produce marsh gas all the year for using with easy management; Combining with the leading industry of agriculture, it obtained the synthetical benefit of four-saving, i,e, saving coal, electric power, labor forces and investment, three-increasing, namely, increasing fertilizer, efficiency and yield, two-reducing: reducing pests and disease, and soil and water erosion and one-purification: cleaning the environment, and provided a reliable technical support for the development of energy-environment model with marsh gas as link.