Abstract: The study of the deep pile cap with a pull pile under an unbalanced bending moment is processed, based on the test and finite element method. The research indicates that this kind of pile cap may induce bending failure due to the beam action, and at the same time, it still acts as a load transfer system of the spatial strut-and-tie due to the arch action. It is definitely universal that both the beam action and the arch action exist in the deep pile cap.