MR series high-precision dynamic gas distribution instrument is a device that realizes dynamic gas distribution. The gas distribution part uses imported high-precision mass flow controllers to control the flow rates of multiple gas outputs in different proportions, thereby dynamically realizing the configuration of various gas concentrations. This instrument can be used to test a variety of technical indicators such as the linearity, accuracy, and repeatability of gas analyzers. It is an indispensable production and testing device for the production, calibration, and maintenance of gas analysis instruments, as well as a fixed concentration gas generating device.