the main purpose of this research is identifing the most important factors influencing urban poverty and provides guidelines for the release of this problem and improves and empowers the residents of slums. The research method is analytical – descriptive with emphasis on pratical and survey method. According to the evaluation and analysis of VIKOR model which rank to the factors of poverty, Many factors (physical, economic, social, cultural, environmental) are at inappropriate level. In Evaluation of urban poverty, physical indicators with an average (0.166) at top priority, economical indicators with an average (0.327) at second priority, social- cultural indicators with an average (0.398) at third priority and environmental indicators with an average (0.570) at forth priority. Spatial patterns of poverty in the city of Khorramabad based on results of studies has a diffused pattern which recently has been oriented to cluster and centralized pattern. The correlation between social classes and Residential problematic tissue areas in distressed areas of Khorramabad shows that the lower classes and low income people is mainly living in the distressed areas in city that decade by decade dragged to the south and the margin of town.