In order to study the seismic response of group silos stored materials to the dynamic lateral pressure of the silo wall, column-supported group silos and independent single silo models with a scale ratio of 1:25 were designed and manufactured, and shaking table tests with different ground motion levels under three seismic waves were carried out. The seismic response characteristics of the two models, the variation law of dynamic lateral pressure and over-pressure coefficient of the silo wall were obtained. The results show that:1) during the earthquake, the phase difference between the storage and the wall of the silo is relevant with the position of the silo body and the location of the measuring point; 2) the distribution law of the dynamic lateral pressure on the wall of the side silo and the middle silo is relevant with the direction of seismic wave input; on the whole, the over-pressure coefficient of the silo is generally smaller than that of the independent single silo; 3) the over-pressure coefficient of the side silo is larger than that of the middle silo, both of which are larger than the values adopted by the code, and the comprehensive correction coefficient adopted in the current code is relatively small; 4) the storage seismic response characteristics of the vertical silo cannot be fully reflected only via the independent single silo, therefore it is essential to consider the different positions of the silo and the direction of seismic action to design the strength of the silo wall structure.