In order to explore the diffusion pattern of chloride ions in concrete with age, under the coupling effect of salt lake brine and dissolution. The salt lake brine environment was simulated in the compound salt solution chamber, and a circulating water pump was used to maintain the fluidity of the compound salt solution. The chloride ion of concrete with age growth in different erosion environments was studied. Research results show that, in different corrosive environments, the chloride ion content of concrete increases with age, and decreases with diffusion depth. Moreover, the farther away from the concrete surface, the smaller the chloride ion concentration gradient difference. Compared with the static chloride salt environment, the flowing chlorine salt environment increases the chloride ion content of concrete, and reduces the chloride ion binding rate. The chloride ion content of concrete in the flowing salt lake brine environment shows a trend of first decreasing, then increasing with age. Therefore, the concrete's resistance to chloride salt erosion is reduced the fluid salt solution environment.