Abstract: The surface of polypropylene non-woven fabrics was modified by hollow cathode remote plasma modification technology. The effect of the plasma treatment parameters on the property of polypropylene non-woven fabrics was studied. The FTIR and SEM were used to analyze the chemical composition and morphology. The results show that plasma treatment time, discharge power, gas flow had a great in fluenceon the alkali absorption property, and the effect of the distance between the sample and acrylic acid feeding tube on treatment results was obvious. The invasion property of the polypropylene non-woven fabrics was improved due to the import of hydrophilic group by hollow cathode remote plasma surface modification. The alkali absorption capacity and rate were raised obviously, and the alkali absorption performance reached the level of foreign battery separator.