Abstract: Based on the field survey and identification of the specimens collected previously, 1 230 species, 498 genera and 112 families were recognized and reported in the Valley of Yalu River of China at the present study. The results of floristic analysis based on genera and species of the seed plants indicate that flora in the Valley belongs to the temperate zone in nature, and it is also evident in endemism. It has the wide connection with different regions in the world. And also, it basically consists of eastern Asian elements (especially closely related to Japan) that are dominant, some north temperate elements, few frigid zone elements. According to the present situation of plant conservation in the Valley of Yalu River, the effective measures for the protection of rare and endangered plants were also put forward.