Seepage pressure is commonly found in geotechnical engineering such as earth dam of reservoir, clay blanket and soil slope. And the analysis of seepage-induced consolidation is a research hotspot. However, the tests on excess pore water pressure in course of seepage pressure consolidation are few. By means of the newly developed device, the consolidation and permeability tests of clay samples subjected to consolidation pressures are carried out under the condition of gradually loading hydraulic pressure. Results show that the applied hydraulic pressure cause the pore pressure in clay increase. The increased pore pressure is partly converted to seepage pressure which will compress soil sample during consolidation. The void ratio and permeability coefficient decrease with the increase of seepage pressure. Then the consolidation coefficient of clay changes correspondingly, and the amplitude of variation is different at different locations. It can be found that the measured value of the excess pore water pressure in course of consolidation is asymmetrical and nonlinear along the height. And the maximum value is located at the lower position. The theoretical calculation values of variable coefficient method verify the difference of consolidation coefficient at different positions of specimens.