Yi Long new soft digesters is an elaborate design ,to import the original Italy equipment line, and use the special PVC coated fabric of digesters, with the new advanced household water-top-pressure biogas system design idea. it takes the special design and uses the special fabricating machinery to produce the improved digesters procuct, which is well targeted ,and has also been widely recognised in this field. Compared with other digesters materials, it has the obvious combination advantages, in the most important three indexes for digesters measurement such as anti-corrosion, anti-seep and anti-pressure. The product quality has got to the high level of standardization, unity and perfectibility, and it can be used to build all kinds of high performance digesters .