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Aiming at the problem that the judgment of railway security inspection X-ray image is highly dependent on manual work and sometimes missed prohibited articles, a railway security inspection auxiliary analysis device based on intelligent recognition technology is proposed. Through the hardware design of video image interface, the problem of adaptation to security inspection instrument is solved. Through the multi process design of tracking process, analyzing process and pushing process, the problem of high-precision analysis and display under 60Hz refresh rate is solved. The tracking process uses the key point difference algorithm to track the security inspection X-ray image, the analysis process uses the improved residual network (ResNet) to extract the features, the Centernet algorithm to detect the prohibited articles, and the push process uses the detection keyboard interrupt to push the alarm image. The experimental test shows that the identification accuracy of prohibited items of the device is 92% and the display frame rate is 60fps. It can be adapted to mainstream brand security inspection instruments,meeting the needs of auxiliary analysis of railway station security inspection.