Abstract: This paper studies the influence of acidic water on the corrosion-mechanical properties of carbonate rocks. Limestone samples with different dip angles were immersed and dissolved in acid solution at a fixed flow rate and normal temperature at pH=3, 4, and 5, respectively. The dissolved samples were subjected to uniaxial compression, acoustic emission(AE), and scanning electron microscope(SEM)tests. The changes in indicators such as mass, wave velocity, Ca²⁺/Mg²⁺ concentration, peak strength, elastic modulus, and AE ringing counts before and after acid erosion were obtained. The chemical and mechanical damage were characterized by changes in wave velocity and AE cumulative ringing count, and the full deformation process and chemical-mechanical damage evolution equation were established. The results show that acidity of the solution is proportional to the degree of dissolution of the rock sample, inversely proportional to the macroscopic mechanical strength, and the influence of dip angle on dissolution is 90°>0°>45°. In the acidic environment, the internal crystals of tuffs are dissolved, the mineral connections are weakened, thus causing changes in macro-mechanical parameters. The results can provide a reference for the evaluation of rock stability in abandoned mines.