A new type of pump-gate combination gate structure is studied and designed in this paper. In order to avoid the low-order natural frequency of the new gate structure falling in the high-energy region of the flow load and thus causing resonance, a coupling model of the water body and the pump-gate combination gate structure is established by ANSYS software to analyze the dynamic characteristics of the structure, and explore the influence of factors such as the water level in upstream and downstream of the gate and the arrangement of submersible pumps on the door structure. Analytical results show that with the increase in water level and the decrease in gate opening, the natural vibration frequency of the structure decreases significantly; the first-order mode of the gate is changed from the whole vibration along the vertical direction to the bending vibration of the gate panel along the direction of water flow; the natural vibration frequency of the pump-gate combination gate structure decreases with the increase in the number of pumps installed.Besides, the water pumps should be concentrated in the middle of the door leaf to make the vibration characteristics of each part more balanced, providing basis for the design of the new pump-gate combination gate structure.