Abstarct: Until now, researchers have provided various methods for seismic analysis of underground structures, including subways, some of these methods are very expensive, some are very time-consuming, and some are of low accuracy, so it is necessary to use an accurate method that is both cheap and has low computational cost. today, subway designers in Iran use mathematical relationships related to structures on the ground such as retaining walls and bridges, which are known as dynamic earth pressure relationships, to estimate the amount of earthquake load in underground structures. the purpose of this research is to investigate the seismic behavior of the vertical shaft of the metro station and also the feasibility of using dynamic earth pressure relationships to calculate the amount of earthquake load in this structure. therefore, in the first stage, 27 vertical shaft samples were modeled in ABAQUS software, and the seismic behavior of the samples was investigated using the hashash method. then, in order to find the optimal dynamic pressure relationship, the amount of earthquake load was first calculated using Hashash method and was compared with the values of earthquake load calculated with the dynamic pressure relationships of the earth, including Wood's relationship, the relationship of the regulations of the Federal Crisis Management Organization of America, and the relationship of the regulations of The Iranian bridge. then, in order to check the efficiency of the optimal relationship, the samples were modeled in the SAP2000 program and were subjected to two calculation models of Hashash and the optimal relationship. in the first calculation model, the vertical shaft structure was subjected to loading including dead load, live load, lateral soil pressure load and earthquake load calculated by Hashash method, and in the second calculation model, the earthquake load calculated with the optimal relationship was used instead of the earthquake load calculated by Hashash method. the investigation of the seismic behavior of the vertical shaft against the earthquake showed that for every 5 meters increase in the height of the elevator shaft, the displacement of the samples increases by 52% on average, and in general, the vertical shaft behaves like a rigid body due to the very small displacement due to the earthquake. also, the comparison of the amount of earthquake load calculated with different methods showed that the Wood's relationship related to the estimation of the amount of earthquake load on the retaining walls is the most quantitatively consistent with the Hashash method, so this relationship was chosen as the optimal relationship in terms of quantity. then the results of SAP2000 software showed that Wood's relationship can efficiently predict the seismic responses of vertical shafts including bending moments and axial forces, so it was concluded that this relationship can be used to estimate the earthquake load in vertical shaft.