To cater for the need of studying super long piles used for longspan bridges and highrise buildings, this paper works out the formula for calculating the maximum length of the super long pile suitable for core drilling on the basis of the current codes and specifications, illustrates the strict requirements for how to drill cores of the actual super long piles and analyzes the technical essentials of the corresponding drilling techniques. Finally, a case study of a 74.02m long pile is presented.