Three-dimensional analytical model was built on a L-shaped high-rise building with podium, layered ground model was adopt to analog subsoil, joint connection unit was introduced, a combined action analysis was maken that of upper-structure-piled raft foundation-ground on high-rise podium buildings that do not set up joint and influence were mainly discussed that of change of pile length of main building and podiums on piled raft foundation. It indicated that, with the increase of pile length of main building, average settlement of main building and podium foundation and settlement difference between them reduced decreases slowly. Generally, bending moment of foundation mat increases slowly with pile length. If pile length of podiums increases, settlement amount of main building has no an obvious change. If settlement amount of podiums decreases, the proportion at which podiums share load of main building increases. Tilt of podiums increases and then tends to drop off, while tilt of main building decreases.