Abstract: Jacked pile is widely used in squat silo, however, it is difficult to determine the characteristics and bearing capacity on site. To study the characteristic mechanism, a large geotechnical test device was designed to simulate the process of jacked single pile, and the influence on the pile tips with different length and different angle was analyzed. The test results showed that the mechanical mechanism of jacked single pile was related to the angle and the length of the pile, while the length of the pile had a significant influence on it, which was mainly related to the soil failure mode and resistance at the pile end. The proportion of the final pressure of the piles was as high as 80%, and there was an extreme depth of 25D(D is the diameter of the model pile); with the gradual increase of the depth, the compaction of the piles caused the pile peripheral pressure to approach the passive earth pressure. As the pile length increased, in the same depth, there was a "degradation" phenomenon in the lateral pressure of the pile at the deep position; the bearing capacity of a single pile increased with the increase of the pile tip angle and the pile length, to 1.04 times of the final pile driving pressure. Therefore, the research provides a theoretical basis, which is improved, for the design and construction of static pressure single pile in sand foundation of squat silo.