Abstract: Aim to the management leaks for the in-pit attendance has because of the single function of the existing uniqueness detection device, a uniqueness detection device based on iris recognition technology is designed in this paper. The device integrates iris recognition, identification card inspection, alcohol inspection, in-pit knowledge test and face capture. It can achieve the personnel uniqueness detection automatically according to the in-pit attendance process. Finally, the uniqueness detection device was tested in the coal mine field, the test results have shown that the device can complete the uniqueness identification quickly, accurately detect exceptional?cases about the personnel entering into the coal mine, and it can capture real-time scene photos as the evidence for the reference in the future.