Abstract: This paper gives an systematic introduction on the mechanism,mounting technology,operation rules and purification effectiveness of high effective oily sewage treatment technology,whose key equipment is DL-100/0.6 type multifunction filter.Combining the vortex separation,microvortex filth removal,corrugated plate oil removal,gravitational settling separation,walnut shell filting and purifying,mechanical packing filter material,reuse and filth removal by reverse washing together,the new filter realities one filter with many functions and has 5 functions as well as 4 effects.