It is shown from the investigation of earthquake damages that the porcelain high-voltage electrical equipment in the power grids engineering is seriously damaged after the earthquake. Based on an investigation of the power grid damages in an earthquake, shaking table tests and finite element analysis (FEA) are conducted of the porcelain high-voltage electrical equipment in order to assess the applicability of the existing aseismatic design standards for electric power establishment. On the precondition of technical and economic rationality, some applicable aseismatic measures are proposed for better guiding engineering design. In addition, some suggestions are also proposed on improving the aseismatic capabilities for porcelain high-voltage electrical equipment.