Abstract：At first，an expatiation of the virtue of squeezed branch piles is made. On the basis of the plenty of test data of squeezed branch piles，the reliability analysis of the vertical ultimate bearing capacity of single pile is made by using the limit state equation of dimensionless random variables. The reliability index b is calculated by the method of JC method. What is more，the influence of loading effect ratio，general safety factor and different load compositions on the reliability index is also discussed. At last，based on the analysis of the data of squeezed branch piles test，the conclusion that the reliability index b of squeezed branch piles outclasses that of the same section piles is drawn.
