###### Abstract  
This paper is based on a shaking table test of \(2\times 2\) straight pile groups and \(2\times 2\) inclined pile groups in non-liquefied sand and saturated sand with different thicknesses. Under the sine wave with a certain peak acceleration and frequency, the lateral dynamic response characteristics, the distribution law of the maximum bending moment envelope diagram, and the p-y curve of the straight and inclined pile groups are studied. The results show that the bending moment of the straight pile group is 3-4 times that of the inclined pile group at the bottom section of the pile in the 300 mm saturated sand. When the thickness of the saturated sand increases to 380 mm, the maximum bending moment of the straight pile group is 6-7 times that of the inclined pile group at the bottom section of the pile. Through the comparison of indicators, it shows that the inclined pile group can have better bending resistance when subjected to the same lateral dynamic load. p 2022 2021 2022 2021 202  
nonlinear dynamic finite element model through a large-scale shaking table test on the E-Defense vibration platform and studied the efficiency of a two-dimensional effective stress analysis pile and soil system in predicting the liquefaction-induced lateral spreading behavior. [PERSON] [25] studied the influence of pile lateral expansion caused by liquefaction on pile response by four large vibration table tests of a laminated box. [PERSON] [26] constructed a reinforced concrete bridge model composed of a single pier supported by a \(2\times 2\) pile group, studied the anti-seismic performance of pile-bearing bridges under different erosion conditions through a 1 g shaking table test, and revealed the failure mechanism of pile-bearing bridges under different erosion conditions. The above research mainly focuses on the bearing capacity and dynamic response of the straight pile and inclined pile, but there are few research studies on the failure mechanism of pile foundations caused by the dynamic interaction of liquefied-soil-pile-superstructure in the earthquake. In practical engineering, the inclined pile plays an important role in resisting the horizontal force caused by wind and wave loads and earth pressure. However, due to the complex dynamic bearing characteristics of the inclined piles, the research content is mainly the force-deformation characteristics, the bending moment distribution and the p-y curve of the inclined pile on the non-liquefied foundation [27; 28; 29]. There are few experimental studies on the dynamic response characteristics of the inclined piles, the relationship between the pile-soil interaction force, and the displacement in the liquefied soil layer. At present, the failure mechanism and dynamic behavior of inclined piles before and after soil liquefaction are not well explained. Moreover, the result of a comparative study on the lateral dynamic characteristics of the inclined pile and the straight pile in the liquefied soil under the action of an earthquake is less. The difference between the mechanical failure mechanism of the inclined pile and the straight pile in the liquefaction process of soil is also a key problem to be solved. It is necessary to further explore the dynamic response characteristics of the straight and inclined pile groups and the distribution law of the bending moment of the pile body. The lateral dynamic response characteristics of the pile group-pile cap superstructure in non-liquefied sand and saturated liquefied sand are focused under the input of a sine wave. The research results analyze the advantages and disadvantages of the lateral bearing performance of the straight pile group and inclined pile group, caused by additional lateral deformation of liquefied soil under earthquake action, and reveal the dynamic interaction mechanism between liquefied soil and the pile group.