Pile deflection and great inclination often occur due to obstruction or hard pile sinking during pile penetration into the design depth. In such situation, the pile should be pulled out and then driving again.Therefore, whether the hammer meets the need of pile extracting should be taken into account during hammer selection. Based on the analysis of the interaction between pile and soil during pile pulling, and combining the renovation engineering of berths No.1 to No.4 of the old port area of Basuo port, we select pile pulling equipments, and further analyze the relationships among the pile pulling, soil property and pile length.