Abstract: The load-settlement relationship of skin friction q of every part of squeezed branch and corresponding settlement s of plate pile is presupposed as hyperbolic function, the necessary parameters are obtained based on the measured data, and compared with q-s relationship of measured every part.The calculated curve is agree well with the measured curve before the ultimate load of every part.This indicates that this method can be used to estimate the ultimate skin friction resistance of every part of the pile.