The recycled concrete is made of recycled coarse aggregates rich in 40%~50% brick aggregates. And the water penetration height method and electric flux method are used in the test to investigate the effects of the replacement rate of brick coarse aggregate and fly ash on the water permeability and chloride ion penetration and further to find out the best replacement rate. Then, the rapid frozen thaw method is used to investigate the effects of the replacement rate. The results show that the impermeability of recycled concrete is lower than that of ordinary concrete. With the increase of the replacement rate, the impermeability of recycled concrete becomes lower. The fly ash has the modification effects on recycled concrete. The penetration resistance and freeze-thaw resistance performance of recycled concrete are the best when the replacement of cement with fly ash is 20%. Under the appropriate replacement ratio, the frost resistant grade of recycled concrete can reach the D100.