The earth can be strengthened by embeding geogrids within. Glass fibers, used in geogrids, are heat-resistant and have stable size and chemistry; however, they tend to break from the clefts on the surface. This project created complex braids for geogrids by wrapping glass fibers (GF) with polypropylene (PP) filaments, preventing the geogrids’ outer friction and combining two materials as a bind. An 8-spindle braid machine and a 16-spindle braid machine were employed for braiding process. The experimental group was divided into two subjects, one was PP/ GF complex braids heat-set and the other non-heat-set. Then PP/ GF complex braids were measured with tensile strength after being immersed in sodium hydroxide (NaOH) solutions and sodium chloride (NaCl) solutions.