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ABSTRACT: To solve the problems of operation and use of PXI instrument software under the domestic LOONGSON Computing Platform, the development of PXI instrument software based on QT is presented in this paper. Firstly, the successful NeoKylin operating system and Qt5.6 development tools are introduced. Then, the development methods and steps of PXI instrument software based on QT are described. At the same time, the programming environment configuration of Windows and Linux, the isolation of interface source code from user source code, the development and transplantation of driver are discussed. Finally, the development and verification targeted at several PXI instrument modules of AMC are presented. In a word, the PXI instrument software currently running on X86 architecture can not be run and used on LOONGSON platform, driver modules and application interfaces must be redeveloped to achieve software adaptation.