The Most poorest of world's communities are most people without land or with little land that mostly live in rural areas Whereas income from agricultural activities in these communities may create employment in the livelihood, Diversity of the rural economy is one of the key issues is essential to pay attention to it. This article attempts for answer to it question that whether the diversification in rural economy can be a tool for achieving sustainable development in rural areas? The research method in this article, is descriptive – analytic method , for data collection were used of two methods field libraries ( questionnaires and interviews ). It also analyzes the data using cluster analysis, Rural Settlement stable levels in three dimensions of economic, social and environmental by 36 indicators was determined in relative scale. The results of the 35villages questionnaire and 295 households questionnaire show that Only 8.8% of rural settlements were investigated, The three dimensions are stable and 44.1 percent of them were stable moderately stable and 47.1 unstable groups. The results of analysis of One-way variance show that The score average of diversification of economic activities 38.6 percent , in Metastable villages 30.7 percent, and in villages of unstable is 27.5 percent. In order to more accurate evaluate of the relationship between sustainability and diversity was used Pearson correlation. Studies show that the relationship between stability and direct diversity was to the place 0.77 percent which is extremely strong. According to thisresults show that Diversification of economic activities in rural areas can be Sustainable of settlements and thus boost rural sustainable development.