The study was made on assessment of the soil quality of Kolasib, Agriculture district of Mizoram. 20 soils samples were selected from various localities of the study out of 200 samples and were found to have their pH fall under five classes of soil acidity. Total acidity in the soils was estimated by following standard method based on the technique of by Sokolov and Soroken. The soil samples were found to be acidic and exhibited increased concentration of Al+3 with the decrease of pH. Upon the different forms of acidity detected in Kolasib, soils can be arranged in decreasing manner as – total acidity > non- exchangeable acidity > active acidity.