Satellite communication,navigation and positioning is an indispensable part of modern marine environment stereo observation platform. Based on the characteristics of BDS-3 satellite global navigation and communication fusion technology,combined with the background of whole region marine environment exploration task,the functions,performance characteristics and the application requirements of BDS-3 in the field of marine environment stereo observation and detection are analyzed from the aspects of national marine strategy and the reality of engineering integration. The exploration and realization of BDS-3 integrated navigation and communication module,and the embedded and modular integration plan of unmanned marine environment observation and detection platform are discussed from the aspects of form,scheme and parameters.