Abstract: In order to solve the problem of constructing prediction model of pile foundation without bearing point curve, the growth curve model was studied. The four commonly used growth curve models do not pass through the origin of the coordinates, which is inconsistent with the objective law that the load tends to zero and the settlement approaches zero. For this reason, based on coordinate translation, the model is properly improved, the curve passes through the origin of coordinates, and data fitting is performed on the test pile data of different single piles. The results show that the accuracy of the improved model is generally improved. The average value of the improved Weibull model correlation coefficient is as high as 0.999 8, and its corresponding reduction factor is more in line with the actual situation. Therefore, it is recommended to use this curve model to predict the ultimate bearing capacity of a single pile.