Pile foundations in soft soil often suffer negative skin friction due to a bigger settlement of soil than piles,such as piles in standing pile wharfs,artificial islands and road foundations.Model experiments of single pile in soft soil under lateral surcharge load are conducted.Strain gauges and dials are located to measure the stress in pile and the settlement or horizontal displacement of pile top.Negative skin friction and bending moment along pile as well as their changing during consolidation are studied.The consequences are as below:the distance of lateral surcharge load has a great influence on the maximum bending moment and the maximum axial force of pile;negative skin friction and the effective stress coefficient keep increasing during the test and the rate slows down;pile with wings and pile away from the surcharge load both have higher neutral points,and in this test,they are 8.83% higher.