The invention discloses an experimental method for model selection of transmission line insulators under strong wind and dust and great temperature difference. The method comprises steps: 1, strong wind, dust and great temperature difference experiments are simulated for tested insulators in an extreme climate environment laboratory, wherein the tested objects mainly comprise a glass insulator, aporcelain insulator and a composite insulator; and 2, the mechanical properties of the tested insulators are analyzed, and analysis on deformation, tearing and wear conditions of the tested insulatoris carried out. The mechanical strength, the electrical properties and the pollution properties of the insulator are considered comprehensively, extreme links of strong wind, dust and great temperature difference are simulated, and the whole experimental process has good rationality and comprehensiveness.