Abstract: The spudcan penetration can give large soil compaction loads on the pile foundation adjacent to the platform, which may seriously affect the bearing capacity of the platform pile. Based on available model tests, the CEL method is adopted to investigate the variation of soil resistance along the pile shaft during the spudcan penetration into sand. The efficacy of the method is proved by comparison with a 1g model test. On this basis, some analyses of the relationships between the soil-pile relative displacement and the soil pressure are carried out in this paper. The analysis results show that the soil squeezing pressure facing towards the pile shoe increases with the increase of the relative displacement of pile and soil until the limit value. Within the range of 10 times of the adjacent pile diameter below the mud surface, the maximum soil squeezing pressure of the pile shaft gradually increases with the depth of the soil layer, and the range of change is (1.5~5.0)K_pγ′z; and when the soil depth is more than 10 times of the pile diameter, the maximum earth pressure of the pile shaft tends to be stable, which is about 5.0K_pγ′z. The soil squeezing pressure on the side far from the pile shoe decreases with the increase of the relative displacement, and finally keeps at (0.1~0.2)K_pγ′z. The resultant force of soil squeezing pressure on the pile shaft increases with the increase of the relative displacement of pile and soil until the limit. Within the range of 10 times of the adjacent pile diameter below the mud surface, the ultimate soil pressure resultant force of the pile increases gradually with the depth of the soil layer, and the range of change is (1.5~5.0)K_pγ′z. When the soil depth is more than 10 times of the pile diameter, the ultimate earth pressure resultant force of the pile shaft tends to be stable, which is about 5.0K_pγ′z. Finally, the influences of the changes in sand friction angle, elastic modulus, Poisson ratio of sand and net spacing on the change of the soil squeezing pressure are quantitatively analyzed.