This study systematically discusses the development process of a comprehensive evaluation device for the fire control system of a certain type of artillery combat vehicles and clarifies the establishment of a mathematical model for the accuracy evaluation of each stand-alone device in the fire control system and the specific calculation method. On the basis of network packet capture, numerical analysis and mathematical statistics theory, a comprehensive evaluation instrument for fire control system of certain artillery fighting vehicle is designed, with the functions of packet capture and storage, packet analysis and display, data statistics, and analysis. The equipment can reflect the failure, status and system accuracy of the fire control system through packet analysis, bringing great convenience to the experimental debugging in the fire control system of combat vehicles. It has been applied to the experimental debugging for a certain type of combat vehicles, achieving good performance.