Abstract:A new prefabricated foundation scheme was proposed to improve the performance of the existing substation distribution building foundation, and full-scale tests were conducted on the new foundation to reseach the mechanical properties of the foundation under eccentric compression. The results of the tests are as follows. Under the design load, only a small amount of steel bars yield at the connection area, and a small number cracks are generated at the foundation step. When the design load is doubled, some steel bars yield and vertical cracks appear near the center of the load. At this stage, there is no significant damage observed overall, indicating the good bearing capacity characteristics of the foundation. Under the design load, the settlement of the foundation meets the design requirements and exhibits good deformation performance. At 2 times the design load, there is no significant damage to the post pouring strip connecting the various composite components. Based on this test, it can be seen that the prefabricated foundation has good bearing capacity, deformation characteristics, and good integrity, which can meet the basic design research. The connection component at the bottom of the foundation is the weak point of the entire prefabricated foundation, and in actual engineering design, the structural reinforcement should be appropriately strengthened.