The invention relates to a test method for analyzing influences imposed on external insulation of power transmission and transformation equipment by haze, which is technically characterized by comprising the steps of 1, carrying out a test on haze components and physiochemical properties; 2, carrying out a test on haze for external insulation contamination accumulation characteristics; 3, carrying out a test for simulating a haze environment, simulating the haze components and establishing a test platform; and 4, carrying out a test on influences imposed on flashover voltage and leakage current by the haze. The test method provided by the invention analyzes the influences imposed on the external insulation of the power transmission and transformation equipment by the haze from the aspects of the test content and the analysis process. The test method is a group of complete analysis methods and test systems, and carries out quantitative analysis and quantitative calculation on the influences imposed on the power transmission and transformation equipment by the haze.