Anti chloride penetrative properties of C30 high performance concrete subjected to two way load at different standard curing ages were studied by ASTM C1202. The test results show that deterioration due to two way load and reparation with curing ages have significant influence on chloride permeability. Under the vertical pressure load, when the lateral pressure load is lower than 30% of the ultimate load, the anti chloride penetrative property of concrete enhances with the increase of the lateral pressure load; when the lateral pressure load exceeds 30%, the anti chloride penetrative property of concrete declines with the increase of the lateral pressure load. When the load level is higher than 30% of the ultimate load, the anti chloride penetrative property of concrete decreases with the increase of time, no matter in two way load or one way load.