Based on the saline soil environment in Ruoqiang， Xinjiang， durability tests were conducted on concrete specimens with water cement ratios of 0.32， 0.35 and 0.38 under three erosion regimes， namely， sulphate solution immersion corrosion （standard curing for 28 d）， saline soil corrosion （standard curing for 28 d）， saline soil corrosion （standard curing for 3 d）. The evolution of the dynamic elastic modulus of concrete under the interaction of the erosion regimes and water cement ratios over time was analyzed. Based on the dynamic change process of concrete dynamic elastic modulus， a service life prediction model of concrete in saline soil environment was established base on Wiener process theory to quantitatively characterize the damage deterioration law of concrete. The results show that： under each erosion regime， with the increase of erosion age， the damage degree of concrete is first reduced and then increased； in the final erosion period， the water cement ratio of concrete is negatively correlated with its damage degree； under the same water cement ratio， the effects of sulfate solution immersion corrosion （standard curing 28 d）， saline soil corrosion （standard curing 28 d）， saline soil corrosion （standard curing 3 d） on the degree of damage to the concrete are successively increased； by Wiener process theory， a model is established to predict the service life of concrete in the saline soil environment， to quantitatively characterize the damage deterioration law. It can be seen that the predicted life degradation of concrete is a 3-stage trend， and its trend is consistent with the deterioration process of concrete in the test.