Ageneral analytical solution is given to the problem of one dimensional consolidation for adouble-layered ground with arbitrary distribution of initial pore water pressure and casual variation of surface load with time. Based on the solution, the consolidation behaviour of the ground is discussedand some diagrams are prepared for practical use. It is shown that, unlike a homogeneous ground, theaverage degree of consolidation of a double-layered ground defined by settlement is different from theone defined by pore pressure, and the consolidation coefficient is no longer the sole parameter of soilgoverning the behaviour of consolidation. The stiffness of soil layer plays an important role in the rate ofconsolidation. The harder the soil layers, the greater the rate of consolidation of a double-layeredground.