Finite element numerical simulation was conducted to investigate the time-dependent behavior of geo-synthetics pile-supported reinforced embankments. Based on comparative study on 3 different cases: (1) un-reinforced embankment; (2) reinforced with geo-synthetics; (3) reinforced with both geo-synthetics and pile walls, analysis was made on the variations of excess pore water pressure induced by the embankment load in soft ground and discussion was carried on the variation of the lateral displacement of embankment, construction settlement and settlement after construction, the maximum tension in geo-synthetics and the load sharing ratio of pile walls. The research conclusion can be the valuable reference for the design or construction of embankments in soft ground.