The feature of good transmission of blue light in the sea, providing a unique advantage for the application of the underwater visible light communication (UVLC), In the term of need of high-speed underwater wireless communication, the design of the two-way underwater visible light communication test system based on blue light LED is designed in this paper. And the underwater test is carried on. The result show that this system can expand the 60 MHz bandwidth of underwater communication channel and achieve the steady two-way underwater communication within 5 meters. The system verifies the feasibility of the high-speed two-way underwater visible light communication and laid the foundation for future research about the high-speed underwater communication based on the visible light.%蓝光在海水中具有良好的传输特性，使得水下可见光通信的优势明显，针对水下高速无线通信的需求，提出了一种基于蓝光LED的水下双向通信测试系统设计方案，完成了系统的整体硬件设计，并进行了下水测试。结果表明，该系统实现了水下通信链路60 MHz的带宽拓展，并在水下5 m距离实现了双向可靠通信。该系统验证了水下高速可见光双向通信的可行性，为今后研究基于可见光的水下高速无线通信奠定了基础。
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