The invention belongs to the field of grid reliability including non-linear load and distributed power supply, and relates to a method for analyzing the influence of harmonics on grid reliability, inparticular to a static voltage stability analysis method considering the influence of harmonics. The invention provides a static voltage stability analysis method considering harmonic influence. Firstly, the harmonic effect is considered when approaching the critical operating state of the system, and the decoupling method is used to solve the harmonic power flow of the system, and the critical operating state of the system under the harmonic effect is obtained. Secondly, two indexes of voltage sensitivity and voltage distortion sensitivity are proposed to evaluate the weak nodes and sensitivenodes of the system considering harmonic effects. Thirdly, Latin hypercube sampling is used to analyze the uncertain harmonic power flow, and the uncertainty of linear load and nonlinear load is taken into account to analyze the static voltage stability of power system.