One of the important aims of economic system is welfare increasing in the society. Regarding that they deem the achievement of sustainable development necessary in creation of welfare for all people. In this study is turned to the effect of cash subsidy on economic and social welfare of rural families in Jaydar rural district. The statistical community of the research‚ including the families of Jaydar rural district in Poldokhtar Township in the Lorestan Province contained 28 of inhabitant villages. In order to give effect to the subject and making objective the issues‚ 13 villages and 328 questionnaires were selected as sample using Cochran equation and because of the excessive volume of number of samples‚ we used the Cochran corrigendum method and 153 family questionnaires were distinguished. To describe and analysis‚ we used SPSS by way of one sample T test and for testing hypothesis we used correlation. The results shows that in the discussion of economic welfare‚ most effects of the subsidy is related to the family demand amounts increases and amount of nutrients. In the discussion of social welfare the high effect of performing this plan was in the amount of accessing to the services indicators and it had the desired effect on the nutrition cases improvement indicators and amount of diets variety. But indicators such as benefitting the hygienic‚ educational and leisure time had they not more effects. Therefore, it can be said that targeted subsidies increased the welfare of rural families.