Abstract:In the current era of accelerated promotion of domestic autonomous controllable platforms, in order to achieve reliable and fast file transfer between different software and hardware platforms in the measurement and control data transmission network, this article designs and implements reliable file transfer software with complete functions and stable operation based on the File Exchange Protocol (FXP protocol) according to relevant technical specifications. The software has functional features such as modularity, portability, meeting user reliability requirements based on TCP protocol, meeting user transmission efficiency requirements based on UDP protocol, and compatibility with different software and hardware platforms. It also has software features that meet security programming requirements. Based on core code design and verification, further improvements and improvements have been made to both software functionality and stable operation to meet stable operation across different software and hardware platforms New requirements for reliable transmission in harsh network environments and fast transmission in smooth network environments.