In view of the difficult problems caused by the complex engineering characteristics of coral limestone soil,such as the difficulty to determine the criteria for sinking and hammering of steel pipe piles and the difficulty to unify the construction elevation of sinking piles,the law of sinking of steel pipe piles in coral limestone soil area is studied.Statistical analysis is used to compare the final hammer penetration,total blows and penetration depth of pile in coral limestone soil.Based on field test and drivability analysis,it is pointed out that driven steel pipe piles is easy to penetrate coral limestone soil,and the main reason for less hammering is due to the soft and hard distribution of coral limestone soil and the fragmentation of soil particles.The results show that steel pipe piles can penetrate coral limestone soil with high penetration number (more than 100 hits)；conventional engineering design and construction experience directly applied to coral limestone soil is prone to large deviations,which should be checked by field load test.