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The engine is one of the important components warship, its stability has a significant impact on the normal navigation of warships. The key components of ship engines (main pump bearings) the research object proposed network fault diagnosis method based on support vector machines for energy and power spectral envelope. First, get a lot can be characterized warship bearing the health status of the main pump engine vibration acceleration information, its power spectrum analysis, power spectrum obtained envelope of energy. The acquired warship bearing the main pump engine power spectral envelope energy feature vectors constructed and designed SVM warships engine main pump bearing fault diagnosis model based on the primary pump bearing fault diagnosis. The results show that, based on critical engine components warships network fault diagnosis SVM combination of energy and power spectrum package, you can achieve a good diagnostic performance of the main pump bearing fault laid engines for ship main pump engineering bearing fault diagnosis basis.