Through continuous bathe equilibrium experiments, the release of aluminum and dissolved organic matter (DOM), and mobility of heavy metals affected by simulated acid rain in contaminated acidic red soil and yellow red soil were studied. The results showed a decrease of pH and base saturation, and increase content of exchangeable acidity in both uncontaminated and contaminated red soil and yellow red soil within the pH decreasing of simulated acid rain, significantly. The content of exchangeable hydrogen is higher and exchangeable aluminum is lower in contaminated soils compared to uncontaminated soils. The release of aluminum was mainly affected by pH of simulated acid rain. At simulated acid rain pH of no less than 4.50, the release was almost the same in tested soils. At simulated acid rain pH of 3.50, the release was almost the same in red soil and different in yellow red soil, obviously. At simulated acid rain pH of 3.00, the release was improving significantly in tested soils. However, the release of aluminum was less in contaminated tested soils than in un-contaminated tested soils, and, at the same time, the mobility of available heavy metals in contaminated tested soils was increased significantly. The release of DOM increased in contaminated red soil and yellow red soil by simulated acid rain, and the complex of DOM- metal is useful for release and transport of available heavy metals.