Abstract: In order to study the applicability of vibro-replacement stone columns in underwater super soft soils, the field tests are carried out. By adjusting the four-parameters, spacing of vibro-replacement stone column piles, vibro-compaction current, vibration duration and filling quantity, the treatment effect of the vibro-replacement stone columns in under water super soft soils is studied using the heavy dynamic penetration tests and standard penetration tests. The roles of the four parameters are studied in the formation process of piles. On this basis, the best combination of these parameters is found. The test results show that under a certain spacing of vibro-replacement stone columns, the filling quantity is the main control factor for their compactness, and the vibro-compaction current and the vibration duration play a key role in their uniformity.