The invention provides a contamination ageing test method for a silicon rubber insulator. The contamination ageing test method comprises the following steps: firstly, cutting a silicone rubber insulator string to obtain silicone rubber insulator sheets; sampling deposited ash of a to-be-detected region to obtain a dust haze sample; then mixing the dust haze sample obtained in the previous step with water to obtain a dust haze contamination solution, and carrying out manual contamination treatment on the silicone rubber insulator sheets by adopting the dust haze contamination solution to obtain to-be-detected silicone rubber insulator sheets; finally, carrying out aging test on the silicone rubber insulator sheets obtained in the previous step, and calculating to obtain a simulated aging state of the silicon rubber insulator. According to the contamination ageing test method provided by the invention, an aging effect of various complex haze environments on silicon rubber materials can be highly fitted, the experiment difficulty is simplified, the experiment cost is reduced, and the experiment time is shortened; the contamination ageing test method has an important guidance significance and economic values.