Due to the high bearing capacity and strong adaptability to various types of foundation,the cast-in-situ pile is widely used in the harbor foundation design.Although the cast-in-situ pile construction technology is already quite mature under normal condition,it faces great difficulties under the extreme topographic condition and unfavorable geology.Incorrect understanding and improper construction technology will lead to hidden trouble for the quality and bring the economic loss.Taking the cast-in-situ pile construction for a harbor engineering in Nanjing city for example,we summarize the construction technology for the punched cast-in-situ pile under special conditions to serve as reference for the similar engineering construction.