The super-long rock-socketed pile with large diameter is widely used,but the bearing characteristics and load transfer mechanism is not totally figured out.Aiming at the shortcomings of the existing field test research and numerical analysis,we carried out a case study and numerical analysis of super-long rock-socketed pile based on the Penang second bridge project in Malaysia.An elaborate numerical model was established to study the bearing characteristics of super-long rock-socketed pile with large diameter.The comparison of field test and numerical analysis indicates that the finite element calculation has good agreement with the results of O-cell test,but the bearing capacity by statnamic test is 30% larger than that of O-cell method because of the influence of soil dynamic friction resistance and pore water pressure.The side friction of pile accounts for 90% of the total load.The friction of pile develops gradually from the top to the bottom and distributes nonlinearly along the pile.The actual total side friction is far less than the designed ultimate side friction.