The effects of simulated acid rain on the germination and seedling growth of peanut were studied. The results indicated that the germination percentage decreased after soaking seeds in acid rain with different pH values. The length of radical roots was shortened by acid rain but its diameter was not affected significantly. Spraying acid rain on peanut seedlings led to foliage damage, both the leaf area and chlorophyll content were decreased, and catalase activity was enhanced. Acid rain treatment also decreased the soil pH value and leaf juice pH value.