Abstract: The research was conducted to figure out the effects of Acacia podalyriifolia phyllode water extract on seed germination and seedling growth of three Solanaceae species (Lycopersicum esculentum, Solanum melongena and Capsicum frutescens). By using seed germination method, the allelopathic effect indexes, germination rate and seedling growth features of receptor plant seed under the different concentrations of phyllode water extract were determinated. The allelopathic index of C. frutescens爷s seed germination was 0.062 under the lower concentration (0.02 g/mL), while the same index and combined index of L. esculentum爷s bud length were 0.37 and 0.09, respectively under lower concentration (0.02 g/mL), 0.30 and 0.01, respectively under relative lower concentration (0.04 g/mL). The allelo-chemicals in the phyllode water extract had different inhibition on seed germination and seedling growth of three species of Solanaceae. Under different concentrations of phyllode water extract, the inhibition effects were some degree different on seed germination and seedling growth, while double effects occurred on L. esculentum: lower concentration of leaf extract had stimulating effect and the higher concentration had inhibitory effect and evident inhibition effects on both C. frutescens and S. melongena, with concentration dependency effects in the tested ranges.