In order to study the safety performance of the pendulum lever structure of the pendulum lever type wave power plant, based on the theory of micro amplitude wave and the assumption of Froude, the wave forces on the pendulum lever of a pendulum lever type wave power generation device under certain wave height were calculated. SolidWorks 3D software was used to build the main structure and pendulum lever model of wave power generation device. Static analysis of the pendulum lever structure was conducted. The model analysis of the fixed structure and the three dimensional model of the whole power plant structure were introduced into ANSYS worksbench. The displacement and stress response of the wave under the wave impact force were solved. The analysis results show that the stress response and displacement response of the pendulum lever reach the maximum value at the vibration mode under certain wave height, but within the specified safety range, they can meet the power generation requirements.