There are very few studies on breccia geology at present.On the basis of the results of axial compression static load tests of two steel pipe piles in Yantian Port,we apply finite element method and hyperbolic fitting method to study the bearing capacity of large-diameter steel pipe piles in breccia geology.The results show that the load-settlement (Q-s) curves are basically linearly elastic when the loads of SZ1 and SZ2 test piles are less than 12 687.5 and 5 862.5 kN respectively.By the finite element method,the compressive ultimate bearing capacity obtained by the SZ1 and SZ2 test piles according to the code has a surplus of 61% and 71% respectively compared with the design requirements,and the compressive ultimate bearing capacity obtained according to the project technical specification has a surplus of 122% and 90% respectively compared with the design requirements.The elastic modulus,friction angle,dilation angle,and cohesion yield stress of fully weathered breccia,strong weathered breccia,and middle weathered breccia which obtained by using the finite element method and test results can better reflect the geotechnical properties of this project,and can be used to supplement geographic exploration data and optimize pile length.