Abstract: In order to exploit different wild ornamental plants of Lianyungang city effectively,a synthetical assessment was established to evaluate the potential landscape application value of 108 wild herbaceous plants of Yuntai mountain in Lianyungang based on the Analytical Hierarchy Process(AHP), which included criteria adaptability, ornamental value, exploitation value as three principal levels and 13 evaluation factors, among that the saline-alkaline tolerance was especially concerned. According to this evaluation system, 32 species of plants, such as Glehnia littoralis, Scutellaria strigillosa, Peucedanum japonicum, ect., most of which are seaside herbaceous plants with high saline-alkaline tolerance and have higher ornamental values, were attributed to the first level, 33 species of plants included Asplenium castaneo-viride, Thellungiella salsuginea, Cyrtomium falcatum, ect., and 43 species Elsholtzia splendens,Allium thunbergii,Liliumbrownii, etc.belonged to second and third level respectively.