Abstarct: Contamination of environment with heavy mextals always a affect the health of human being, plants and animals. These mextals are elements that are not easily decomposed in chemical and biological processes. However, They have a great desire accumulation in the soil, aquatic environments and plant organs. Plants which use large amounts of pollutants such as heavy mextal chromium (VI) is accumulated, consumer health is at risk, because Cr (VI) is one of the most potent known carcinogens. The purpose of this experiment was to evaluate the effect of organic matter on transformations of chromium (VI) in soil and determine the concentration of chromium (VI) in the organs of several crops. The greenhouse experiment was conducted as factorial baxsed on randomized complete block design with four replications on 4 crops (spinach, sunflower, sorghum, and wheat) in the greenhouse of Research Station of agriculture college in Shahrood university of Technology in 1393. Treatments include chromium in three levels 0 (control), 125 and 250 micrograms of chromium per kilogram of soil from the source of potassium dichromate and organic materials in three levels, no use (control), manure (at the rate of 50 tons per ha) and vermicompost (at the rate of 10 tons per ha). The results of this research show that the negative impact of different levels of chromium concentration on growth of plant shave been examined, so that by increasing the chromium concentration of the dry weight of shoot and root, shoot and root length of plants and also chlorophyll a, b Content and carotenoeid reduced. Adding manure and vermincompost to soil contaminated with chromium, by increasing soil organic matter improves soil fertility and significantly reduced the effects of stress caused by chromium(VI) in plants was in vestigated. It is likely that the addition of organic matter to soil contaminated with chromium during oxidation- reduces process account is Cr (VI) reduction. The results of this study indicate that adding manure and vermicompost to soil contaminated with heavy mextal chromium, through stabilization of Cr (VI) in the soil, reduce the transfer of contaminants from soil to plant organs. Accumulation of Cr (VI) in plants root was higher than shoot which can be due to the accumulation of heavy mextal chromium in roots than shoots which attributed to low dynamic of this mextal. Application of manure and vermicompost in soil contaminated with chromium, in addition to increasing soil fertility and providing essential nutrients for plant growth, the Cr (VI) reduction in the soil and thus helps to human health in sustainable and organic agriculture.