Abstract: Based on a wide range of data sources, through text analysis, the structured translation and description of information such as power status, equipment attributes and inspection results described in the inspection work order can be realized. The advanced word segmentation technology is combined with the massive data of the electricity inspection work order. The method of step-by-step demonstration and vocabulary annotation is adopted. Helically improve the accuracy and effectiveness of the file analysis model. The knowledge map technology is used to restore the risk and hidden danger assessment system and customer relationship of safe power use. Objectively present the overall picture of the power safety risk assessment process and the impact relationship in the form of network diagram.