This article introduces the design and implementation process of the vessel ship satcom stations multiplex spectrum monitoring system, introduces the overall design ideas, gives the system hardware design structure composed of frequency conversion and calibration + frequency spectrum analysis and calibration + display and control. According to the system requirements and combined with actual situation, this paper introduces the design idea of comprehensive test software which realizes the capabilities of ship borne satellite communications multichannel spectrum signal’s online monitoring with vessel, realtime analysis and testing RF signal of ship borne C, Ku/Ka satcom station, realtime distributing test data and alarm information using LAN. The system improves the reliability and maintainability of the satellite communication system, and gives strong guarantee for safe and reliable operation of the system. Tests show that the system design is simple, stable and reliable, meets the functional requirements.