8 kinds of woven and nonwoven geotextiles with design strength were used for plasma treatment. In case of hydrophobic treatment of woven and nonwoven geotextiles was used gas of C<SUB>2</SUB>F<SUB>6</SUB>, parameter of plasma did electric power of 500 watt, plasma treated time of 10 and 20 min, and gas flow rate of 1500 sccm on treatment condition. In case of hydrophilic treatment of geotextile composites was used gas of O<SUB>2</SUB>, parameter of plasma did electric power of 2500 watt, plasma treated time of 10 and 20 min, and gas flow rate of 2000 sccm on treatment condition. Result of the engineering performance test, tensile strength of geotextiles increased after plasma treatment, but chemical resistance had not altered. Finally, long-term performance of plasma treated geotextiles was reviewed through application of Arrhenius equation analysis.