Abstract: Dry-wet cycling accelerated corrosion tests were carried out to three types of specimens (brick, mortar, block) in solution of organic acid and sulfate, and pure water respectively. The erosion resistance of specimens was evaluated through mass, compressive strength, relative dynamic elastic modulus and mortar flexural strength, and then the deterioration mechanism of the masonry structure under composite action was analyzed. The results show that with the increase of dry-wet cycles, the mass, compressive strength, relative dynamic elastic modulus and mortar flexural strength of the specimens displayed a trend of first increasing and then decreasing in the solution of organic acid and sulfate, while they displayed a slow decreasing trendy in pure water. The damage of dry-wet cycling to the brick, mortar and block in the solution of organic acid and sulfate was more obvious than that in pure water.