In view of the phenomenon that the connecting beam of the high-rise intake tower is easy to generate large tensile stress under earthquake action, the finite element model of the intake tower was established by the ANSYS finite element analysis theory, and the dynamic response of the structure under earthquake action was calculated by the reaction spectrum method. By designing three schemes, the necessity of the existence of the connecting beam structure of the trash rack and the influence of the cross beam (vertical flow direction) and the longitudinal beam (flow direction) on the stress and deformation of the key part of the intake tower are studied. The results showed that the high intake tower can decrease the axial tensile stress and limit the displacement of the barrier pier, by increasing the cross beam size. Increasing the longitudinal beam size will adversely affect the local structure. Therefore, by appropriately increase the cross beam size and reduce the longitudinal beam size can effectively reduce the cost and improve the structural safety. This conclusion provides reference for the size adjustment of the connecting beam of high intake towers with similar structures.