It　was　shown　that　geosynthetic　reinforced　pile　supported　(GRPS)　embankments,　which　were　constructed　on　soft　soil,　could　improve　the　bearing　capacity　of　ground,　reduce　differential　settlements,　enhance　the　pile　efficiency,　and　diminish　construction　cost.　But　the　theory　of　design　method　for　GRPS　embankments　was　not　reliable.　The　bearing　capacity　of　the　soft　soil　was　ignored　in　the　existing　methods,　and　it　was　not　consonant　with　actual　instances.　Based　on　the　idea　of　three-dimensional　space,　an　improved　solution　of　Hewlett＇s　method　for　soil　arching　effect　in　piled　embankments　was　obtained,　then　the　function　of　geosynthetic　layer　and　bearing　capacity　of　the　soft　soil　were　considered　to　deduce　the　formula　of　pile-soil　stress　ratio,　which　was　applied　to　practical　design　to　introduce　an　integrated　method.