Boarder villages of sistan region in Iran are so less developed and their location on the boarder of Afghanistan has fueled this less development. Subsequently, Afghan's settlement in this region has caused some special socio-economic situation in sistan region and has overwhelmed lots of functions of this region's villages. The goal of this article is an analytical study on the effects of Afghan's settlement on the socio-economic development of boarder villages of Sistan. Based on the library study, field studies and questionnaire the method of this article was description- analytical study. The collected information was analyzed by means of Taxonomy method and spearman test inlet in SPSS software. The results of level taxonomy showed that among the 31 studied villages the number of 6 villages were on normal level and 25 others were on middle level or bellow. Also the results of spearman test with a degree of 99 percent certainty shows the correlation between afghan's settlement with economic development ( -0.814) and social development( -0.679) and concluded that the socio-economic situation of the region will improved by afghan withdrawal from Sistan area.