The post-grouting technology can effectively improve the soil disturbance and break the mud crust around the bored pile. Most of the researches on post-grouting technology are focused on pile tip post-grouting technology, while the pile side grouting is rarely involved, which affects the further application of this technology. To study the influence of pile side grouting volume on the compressive load behavior of pile, An indoor model tests was carried out on the basis of the post-grouting technolog of the field pile test. The test results show that, when the load is at a high level, the bearing capacity of the pile with 2 L and 3 L grouting volumes are respectively 18.2% and 66.0% higher than that of the pile with grouting volumes of 1 L. The increase range is positively correlated with grouting volume, and the settlement of pile top can be greatly reduced. The axial force of the post-grouting pile decreases rapidly near the position of grouting, and the axial force near the tip of post-grouting pile is relatively low in the whole loading process. The post-grouting pile shows the characteristics of the friction piles. The cement grout diffuses upward and downward from the grouting position, and the diffusion heights are both about 14 times the pile diameter under the stuation of this indoor model test. The pile side resistance of the post-grouting pile increases significantly in the range of the grout diffusion stage, and the increase degree is more obvious the closer to the grouting point.