Calibration test system of gas sensor

The utility model provides a calibration test system of a gas sensor, and relates to the technical field of gas sensor detection. The gas sensor comprises a PCBA board. The calibration test system comprises a gas storage box used for storing target gas, a gas test box capable of being communicated with the gas storage box in an on-off mode, at least one calibration test tool and an upper computer server. Wherein the calibration test tools are arranged in the gas test box, and each calibration test tool is provided with a plurality of test stations used for installing PCBA boards. The upper computer server is connected with at least one calibration test tool so as to acquire calibration test data of the PCBA board. According to the technical scheme, the PCBA board is directly tested before the gas sensor is packaged, the test space is reduced, PCBA boards produced in the same batch can be tested at a time, calibration test data of all PCBA boards can be collected, and stability and consistency of a test enviro