In order to study the change character of pore water pressure in saturated porous soil during the process of consolidation , a finite element model should be established according to the real engineering conditions. The model accuracy is verified by comparing the simulation results with the situ test results. Then using this finite element model to set related conditions, the paper deeply researched the change regularity of the excess pore water pressure under the load applied. The analysis results showed that due to the evanishment of excess pore pressure with the passage of time, after 365,0, 25,8, 8days the foundation settlement values had obvious rebound, and the farther the distance to the load center, the more obvious this phenomenon was, the changed sensitivity of excess pore water pressure was connected with the drainage, the closer to the drainage surface, the more sensitive the change was, and the farther to the drainage surface, the more dull the change was.