Today, one of the important urban challenges is undesirable parks site selection that pay attention to this factor can be Promote Livability and Vitality in urban space. The purpose of this study is assessment Affecting Factors on urban park site selecting and Its Optimal Site Selection due to lack of them. Analytical Research method is Descriptive and Analytical methods with an emphasis on practical aspects. So classify and analyze the data, Analytical Hierarchy Process and Analytic Network Models, is used. For weighting layers used, 10 experts, professors and urban planning opinions. This research after the distribution of existing parks And determine free download the radius of standard performance using network analysis that 53.18 percent of the city area are beyond access to parks The criteria consistent, inconsistent, population density and a key communications network for locating, as the main criteria considered in the optimal location That in Incompatible layers Distance from existing parks whit Coefficient 0.598 Rated first The compatibility layer as well as access to culture land use whit Coefficient 0.600 Rated first. And final weight criteria was calculated by using network analysis model also that the population density layer whit Coefficient 0.395 Rated Second place and Compatible layers whit Coefficient 0.300 Rated Second place. Finally, according to the present investigation by combining several layers of impressive land uses the final map of the optimal areas in five categories from compatible to incompatible divided. 117.39 Hectare of the land city is compatible for construction of new parks.