Different amounts of ink sludge were combined with different grades of paraffin oil and chlorinated polyethylene,focusing on the influence of ink sludge as a synergistic plasticizer on the plasticizing effect of EPDM and nitrile/chlorinated polyethylene rubber.The results show that the physical and mechanical properties and vulcanization properties of non-polar EPDM and polar nitrile/chlorinated polyethylene rubber are improved to a certain extent with the increase of the dosage of ink sludge,which indicates that ink sludge has a good softening and plasticizing effect.