Calibration system used for SF6 gas micro-water content detector in GIS

The present invention provides a calibration system used for a SF6 gas micro-water content detector in GIS, the calibration system includes a branch I and a branch II, the branch I and the branch II are respectively connected with a SF6 gas micro-water content detection special gas chamber, in the branch I, one end of the SF6 gas micro-water content detection special gas chamber is connected with a calibration module, the other end of the SF6 gas micro-water content detection special gas chamber is connected with a gas supplementing port, and in the branch II, both ends of the SF6 gas micro-water content detection special gas chamber are respectively connected with a gas micro-water content regulation module and a pressure control module to form a loop. Compared with the prior art, the calibration system used for the SF6 gas micro-water content detector in the GIS has high calibration accuracy, and ensures the accuracy of the to-be-tested SF6 gas micro-water content detector, so that electrical insulation properties of repaired SF6 electrical equipment which is detected by the micro-water content detector are good, and the entire GIS operational efficiency and safety can be ensured.