With the high-performance and complicated structure of marine power plant, the safety reliability operation of marine diesel engine is paid more and more attention to considering security and economic benefits. Fault diagnosis technique has been developed rapidly in recent years. This article discusses fault diagnosis technique in detail from aspects of failure mechanism of marine diesel engine, fault signal acquisition of marine diesel engine, fault feature extraction of marine diesel engine, fault recognition and diagnosis forecast of marine diesel engine. The present situation and the existing problems of fault diagnosis technique on marine diesel engine are pointed out. Finally development...