Abstract: The ecological engineering at Wulitang E-cological Farm is characterized by biogas engineering and oxidizing channel ot liquid slurry. Its structure and design are simple, practical and effective. The comprehensive analysis of the farm and its four subsystems shows that the great benefits in environmental protection and economic development have been achieved since the introduction of ecological engineering in the farm. 

Key words: biogas engineering, oxidizing channel, ecoiogical efficiency, economic benefit