在高速数据传输网络中．UDP协议有着其它数据传输协议无法比拟的优势，但也存在着传输可靠性差的问题。文章在细致分析UDP协议特点的基础上，对其关键技术进行了改进，设计出了一种新的可靠UDP协议，大大提高了数据传榆的可靠性。-In the high-speed data transmission network. UDP protocol with other data transfer protocol can not match advantage, but there is also the problem of poor transmission reliability. The paper features a detailed analysis based on the UDP protocol, to improve its key technology to design a new reliable UDP protocol, greatly improving the reliability of data transfer elm.