High-strength polypropylene woven geotextile(HPWG) is currently being developed as an important geosynthetic material for reinforcement and separation. Since large specimen and grip size decrease variability caused by dimensional fluctuation and side wall effect, the criterion to test the tensile properties of geotextile has been modified to the wider grip and specimen size since the conventional grab method was first introduced by KS K0520. Unlike nonwoven geotextile, the tensile strength per unit length and strain of woven geotextile tends to decrease as the gripping size increases. Based on these facts, the development of HPWG is certainly essential to the geotextile manufacturing company. In the present work, HPWG satisfying tensile strength greater than 10 t/m on the basis of KS F2124 was made from slit film yam by two different weft picking systems of water-jet weaving loom. From the comparison of KS F2124 with KS K0520(grab method), we found that the former showed much lower tensile strength per unit length and strain than the latter. And the addition of 1.5% carbon black had the capacity to give HPWG a good protection against UV degradation.