This paper reported the fulminant haemorrhagic disease of bluntnose black bream（Megalobrama amblycephala）in Jiangxi,China．The typical symptoms of the disease included:decay in the end of dorsal and caudal fins; congestion and hemorrhage in skin; muscle and intestines with ascites．Two kinds of bacteria were isolated from the sick bluntnose black bream with typical syndrome and were proved to be its pathogen by artificial challenge．The pathogens were identified as Aeromonas hydrophila and Aeromonas sobria by morphological observation and biochemical test.The antibiotic sensitivity analysis showed that vancomycin，amikacin，tobramycin，kanamycin，cefradine，cefoperazone，cefazolin，piperacillin and norfloxacin were sensitive to Aeromonas hydrophila and Aeromonas sobria；A.hydrophila and A.sobria were resistant to gentamycin，ceftriaxone，ceftazidime and cotrimoxazole.