Sour jujube was selected as the materials to isolate endopytic bacteria.76strains of endophytic bacteria were obtained and their antibiotic activities against pathogenic fungi were evaluated in this study. The antagonistic effects showed that8of them expressed antibiotic activity on Alternaria alternata. By measuring antibacterial activity of extracellular from the antagonistic strains, antagonistic substances with higher antibacterial activity were selected especially the substance from SZG-1and SZG-23.The...