(LXI (LANeXtensionforInstrument) technology is an organic connection between computer technology, network technology and instrument technology, so the network communication part is an inevitable part of it. Using the TCP/IP network tool integrated in VxWorks, an excellent embedded real-time operating system, about the development and use of LXI virtual instruments, it discusses the method of choosing VxWorks and double buffer team to terminate the non-blocking communication of LXI network, and through engineering practice.)