Arrigation is One of the most important factors in Agricuture. Designing and constructing a water distributive network is of greate importance. This paper aimes at investigating that which irrigation system is the optimal one for sugarcane farms in Khuzestan. To this end 12 techinal and economic indices have been selected as criteria and multiple criterion decision making method has been applied to find the optimum solution among 4 alternatives. The data was gathered for the period 1991-2001 using postal questionnaires and face to face interviews. The findings show that amongst 4 alternatives the optimal distributive system is the channel irrigation system in this case.