In order to achieve better filtering requirements, we introduced a complete set of German filter cloth production line and technology. By virtue of 30 years of filtering experience, the heavy German rapier looms weave the thinnest silk threads into filter cloth of high density and different hole patterns by using 0.3-3.5 tons beating-up force after each weft across warp. Under same area the filtration holes of filter cloth are 20%-50% more than other filter cloth, which improve the filtration speed greatly. The filter cloth was woven under constant temperature and humidity, which eliminate the fabric burrs caused by static electricity. What's the most important is that monofilament filter cloth can make the filter cakes fall off automatically, which has conquered the unsolved problem ever since.