The use of unconventional water is widely used worldwide as a water source, especially in dry and semi-arid areas. Considering the severe shortage of water resources in Iran, the utilization of treated municipal wastewater in the agricultural sector is an effective way for water requirement of plants and reduce environmental pollution. Phytoremediation is, as an environmetally-friendly method to eliminate many pollutants. Vetiver grass (Vetiver zizanioides L. Nash) and Reed plant (Phragmites australis) are two special plants for phytoremediation because of their unique physiological and morphological characteristics. The present research was carried out to improve the quality of leachate by Vetiver grass and Reed plant and using hydroponic system and evaluate its efficiency in the removal of contaminants. For this purpose a pilot study (barrels containing 200L leachate) was conducted including two plants, two densities, four periods (3, 7, 14, 21 day) and control (with no plants). All experiments performed with three replications. The field trials were performed in a completely randomized design. At the end of each period, BOD, COD, Nitrate, Phosphate, Potassium, Sodium, total Calcium and Magnesium, EC and pH were determined and evaluated. The results showed that the amount of COD, BOD, Phosphate, Nitrate, Potassium, Sodium, total Calcium and Magnesium, EC and pH decreased 68%, 60%, 82%, 83%, 85%, 35% , 25%, 17% and 1%, respectively for the Vetiver grass after 21 days. Also, the results showed that the amount of COD, BOD, Phosphate, Nitrate, Potassium, Sodium, total Calcium and Magnesium, EC and pH decreased 65%, 30%, 60%, 63%, 70%, 20% , 25%, 15% and 0.3%, respectively for the Reed plant after 21 days. Finally, the results indicated that the best density for the treatment of Vetiver grass and reed plant was a density of 4 in a closed environment. Key Words : leachate wastes, phytoremediation, Vetiver grass, Reed plant, Hydroponic Crop