The　geosynthetic　reinforced　pile-supported　(GRPS)　subgrade　may　be　constructed　for　embankments　over　deep　weak　soil　strata　to　improve　the　bearing　capacity　of　the　subgrade　bed,　reduce　total　and　differential　settlements,　enhance　the　efficiency　of　transferring　the　load　from　the　soil　to　the　piles,　and　reduce　the　construction　cost.　Finite　element　analysis　with　updated　mesh　technology　is　used　to　study　the　mechanism　and　behavior　of　load　transfer　of　the　GRPS　embankment,　which　is　a　combination　of　soil　arching　effects　in　fill　and　the　stiffened　geo-synthetic-aggregate　platform.　The　influence　of　the　design　parameters　on　GRPS　embankments　is　studied　in　detail,　the　design　parameters　include　the　embankment　height,　property　of　fill　construction,　pile　spacing,　pile　module　of　rigidity,　geosynthetic　tensile　stiffness,　and　position　of　the　geosynthetic　reinforcement.　Some　conclusions　of　the　numerical　analysis　are　helpful　to　the　design　of　the　GRPS　embankment.