Combined with a project of rock-socketed filling pile, and based on the influence of pile bottom sediment on the bearing property under the simulation of sediment at the end of the pile with elastic-plastic finite element method, analysis was made on the changes of load-settlement curves, axial force of the pile, shaft resistance, pile-end resistance and the total pile-shaft resistance. The load-settlement curves from the finite element simulation are consistent with the measured curves. The sediment at the pile bottom greatly reduces the pile end resistance, also reduces the ultimate bearing capacity of the pile and increases the settlement of the pile head.