Taking the cast-in-situ bored pile engineering of the wharf in Tianjin Nangang industrial area for example, we analyze the construction technology of inshore cast-in-situ bored pile of early-stage land reclamation, discuss the difficulty and key control point of cast-in-situ bored pile, and summarizes the achievement of quality control in the process of construction, so as to accumulate experience for the construction of cast-in-situ bored pile of similar projects.