The invention relates to a silicone rubber insulating material hydrophobicity transfer testing method, and the technology of the methodis characterized in that: obtaining dirt capable of accurately representing surface state of an insulator in the field; carrying out a pretreatment for insulator surface dirt obtained on the spot ofa laboratory, removing comparatively large particles in the dirty, andtaking dirt of a specific weight; pouring a certain amount of distilled water into a measuring cup and uniformly spreading the dirt of the specific weight on the surface of water in the measuring cup and timing, and recording a dirt wetting time till all the dirt is wetted by distilled water and sinks to the bottom of the measuring cup; determining a hydrophobicity transfer grade of theinsulator surface according to the wetting time of dirt. The invention has a reasonable design,insulators during operation are not needed to be pickeddown, thereby reducing workload and safety risk during test. The test equipment in use is simple, only a timer, an electronic weighing device, a measuring cup and distilled water are needed. Compared with atraditional test method (water spray grading method), the test result has a good consistency and is credible.