Abstract: The wool fabric was modified by cationic reagent and dyed with superfine pigment which was prepared by researchers themselves with anionic polymer disperser with exhaust method.The influence of pretreatment conditions such as concentration of cationic reagent,pH value of the bath,temperature and duration of treatment on the dyeing property of the fabric was studied.The results show that the dry and wet rubbing fastness of the wool fabric dyed with pigment via exhaustion is gray scale ratings of 3～4 and 4 respectively.The tensile strength and elongation at break decrease slightly with the increase of bath pH value.The test results of bending rigidity and hysteresis of bending reveal that the wool fabric has soft handle and good elasticity.