The invention belongs to the technical field of life prediction, relates to a laboratory life prediction method of a rubber product. Basic damage parameter weights are distributed according to grey relational degrees of a multi-temperature point laboratory environment, an aging
damage factor Af is constructed, an Af-T-t model is established, and life prediction for a target sample is realized. According to the laboratory life prediction method of the rubber product, permanent
compression set is taken as a basic parameter, an interval from normal temperature to the highest test temperature Tmaxof a to-be-tested sample is taken as a test temperature interval, 15%-30% of the permanent
compression set is taken as test load, then the grey relational degree gi of the basic damage parameter on the permanent
compression set is calculated, the
damage factor Af of the to-be-tested sample is obtained, (1-Af) is utilized as a
life evaluation characteristic index, a ternary model of Af-T-tau is obtained, and
ageing time tau of the same test temperature is substituted respectively, so that the
life value at the expected storage temperature is obtained. According to the rubber seal product lifeprediction method, the prediction accuracy is higher, and the temperature range is wide. The method is applicable to life prediction of the rubber seal product.