The manufacturing processes and engineering properties of geocomposites, which were fabricated with two different functional geosynthetics; geotextile for separation and geogrid for reinforcement, were investigated. Geocomposites were manufactured using three different types of resins and one hot-melt adhesive type. Among them, EVA(ethylene vinyl acetate) showed the most excellent bonding effect. The mechanical and hydraulic properties of spunbonded geotextiles and geogrids were evaluated. The geocomposites manufactured in this experiment showed that the tensile strengths are increased, and the breaking strains are decreased. The EOS(effective opening size) and permittivity of the two different spunbonded geotextiles, used as the raw material in geocomposites, were also compared. The chemical resistance of the geocomposites in this experiment was deduced by comparing the tensile strength reduction under acidic and basic circumstances for four months. The results showed that tensile strength was reduced by less them two percentage.