Based on the test of the single pile load,axial force from different depth can be measured inthe way which dividing the depth of the pile into several sections场stratifying the pile and burying re-inforcement meter into it evenly.Settlement of the top of pile under various levels load is also meas-ured in the same way.Under the vertical load,QS curve characteristics of the single pile as well asdistribution of the axial force are precisely analyzed in this article.Pile axial force along the pile grad-ually decays with the increase of the load level;the rate of the decay is getting bigger at the sametime.It changes severely with the change of the depth of the pile.