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In order to prevent the harm caused by the too large ship shafting vibration when the process of moving,the paper designed and implemented a software system of Ships biaxial vibration analysis, to realize the ship biaxial shafting vibration analysis and display.For the dual-channel real-time test collected data of torsional vibration and swing vibration were processed,excluding the coarse value that error is too large to improve the accuracy of vibration analysis,and do the DFT transform to the torsional vibration amplitude data,find the abnormal amplitude spikes on torsional vibration high harmonic to prevent the harm caused by the too large torsional vibration at this speed.Real ship tests show that the system test accuracy,vibration analysis result displayed intuitive,meet the requirement of ship dual propulsion shafting vibration analysis’s design.