Abstract: There is a huge amount of wet sludge produced by sewage treatment plants in China． However，most of them is not treated in a safe way． Sludge drying，which realizes the quantity reduction，harmless treatment，stabilization and recycling has been widely promoted in recent years． Compared with other sludge drying technologies，two-phase sludge drying technology has obvious advantage in energy consumption and safety and becomes more and more popular both in China and abroad． On the other hand，due to some problems such as high fiber content and viscosity，hard objects in the sludge from some areas，the steady running of this technology is affected． Through the practice of sludge drying project in Suzhou Industrial Park，it was taken the pertinent measures under the consideration of local conditions，and the problems in the operation of the drying process were solved． In consequence，the continuous and stable operation of the production had been realized．