Depok City is a city in West Java Province, Indonesia. As the Infrastructure Development in Depok City is rapidly increasing, so the Depok-Antasari toll road construction is built on soft clay soil layers, so that the subgrade has a low carrying capacity that can result in the planning of the embankment having a large compression carried out by research PT Girder Indonesia's laboratory. Therefore it is necessary to plan a pile of basic soil improvement to increase the carrying capacity of the subgrade and accelerate the process of soil compression. So that a preloading method is needed to improve the characteristics of soft soils. For planning the pile on soft soil using manual method and with the help of geostudio / slope w from the calculation analysis that has been done, it is obtained the height of the pile plan (HR) as a load of 9 m with 30 days time. For a long period of decline in original soil without PVD (prefabricated vertical drain) is 300 years, for a time of decline in original soil using PVD 48 weeks or 1 year. On the results of the pile safety factor after PVD is 1,800 with a length of 18m, while for the pile safety factor before PVD is 1,100.