Abstract: By using leachate concentrate from a refuse landfill in Chengdu，the recirculation experiments were carried out in landfill columns filled with garbage of 15 landfill ages． The influences on recirculation effluent salinity of the recirculation load，frequency，velocity and mode were researched． Based on the experimental results，modeling with a novel grey absolutely correlation degree analysis method， the sensitivity effluent salinity from the leachate concentrate recirculation process to recirculation parameters were researched． It is showed that the sensitivity of effluent salinity to recirculation parameters were: load( 6 L/d) ＞ velocity( 24 L/h) ＞ load( 4. 5 L/d) ＞ frequency( 6 times /d) ＞ frequency( 3 times /d) ＞ mode( central water distribution) ＞ velocity( 6 L/h) ＞ mode( dispersing water) ． So the recirculation load and velocity are priority control factors for reducing the salinity of recirculation effluent．