Abstract: Lantana camara is a highly invasive alien plant of Verbenaceae family, and now is spreading rapidly throughout the south-central of China, especially in southern China. The allelopathic effects of aqueous extracts from different parts of Lantana camara were studied by laboratory bioassay in this paper. Results showed that the aqueous extracts from fruits, stems and leaves of Lantana camara had a considerable inhibitory effect on seed germination and seedling growth of Salvia splendens. The germination energy, germination rate, bud length and root length of Salvia splendens were all reduced, but the inhibition index of bud and root growth were increased in the meantime, and the allelopathic inhibitory effects generally increased with increasing concentrations. Bioassay of aqueous extracts from different parts of Lantana camara showed that inhibitory effects on germination energy increased respectively from stem, fruit to leaf, while the inhibitory effects on germination rate, bug length and root length changed respectively from fruit＞leaf ＞stem. This indicated that Lantana camara had strong allelopathic effects, and would be beneficial to enhance its capacity of interspecific competition and to promote invasion.