Abstract: lettuce pot experiment to study the vermiculite, dolomite, phosphate gypsum, peat as a soil conditioner on arsenic contamination of the chlorophyll content in lettuce, MDA, lettuce permeability of the membrane and soluble sugar content. The results showed that the peat (20 g / kg) treatment is to improve the lettuce physiological indicators of the best. Improver has increased four kinds of lettuce soluble sugar content trend.