Abstract: he regulation of informal waste dumps is an inevitable move to promote the construction of ecological civilization. Combining with the project case, the regulation methods of the informal landfill sites through excavation and screening were discussed. The screening process is very complex, and the screening quality would be affected by the screening material characteristics, the screening equipment and other factors. Through the field test, the effect of natural drying and adding different proportion of quicklime on moisture content, and the effect of roller screen speed on screening quality under the optimal moisture content were analyzed. The results indicated that the moisture content of refuse soil could be improved effectively (24.2%) with the addition of 4% quicklime, the refuse soil was overturned and exposed to sunlight for 1 hour followed by covering for 2 hours. When the rotary speed of the drum sieve reached 25 r/min, the optimal screening efficiency （87%） was obtained, which met the requirements for project implementation.

Key words: 　informal waste landfill sites, screening and utilization, water content, rotating speed of drum screen