The invention relates to a composite insulating-material tracking and electrical erosion resistance performance determination method. The method comprises the following steps that (1) a silicone rubber material to be tested is made into a cuboid sample (1) and the sample (1) is numbered; (2) three kinds of filths with different components are configured; (3) the obtained three kinds of filths are sprayed to the three samples (1) respectively and drying is performed; (4) the three samples (1) which are sprayed with the filths are installed on a pressurization platform, after an assigned voltage is pressurized, timekeeping is started and the voltage is maintained to be constant for 15 min, and during this period, an environment temperature is controlled to be 28 DEG C, a relative humidity is 65-70%, a discharge phenomenon is observed and a high voltage end current is recorded. By using the method, the tracking and electrical erosion resistance performance of a silicone rubber composite insulating material operated in a special filth condition can be determined and selected, and an influence of the special filth condition on surface discharge of a composite insulating material surface is considered and equivalence is good.