Super-long pile was designed for the pile foundation of 117 mansion in the central business district of high-tech zone in Tianjin with high quality requirement and construction difficulties. The paper introduced the construction of super-long bored grouting pile, by the effective control on embedment of steel protective pipe at borehole entrance, mud quality, hole position deviation, borehole verticality and sediment on bottom, borehole quality reached the design requirements with high drilling efficiency and lower cost.