The invention provides a cable well state comprehensive monitoring and early warning system. The system comprises an intelligent monitoring terminal, a Zigbee wireless communication module and a backstage monitoring host for early warning analysis; the on-site intelligent monitoring terminal communicates with the backstage monitoring host for early warning analysis through the Zigbee wireless communication module; data summarized by the on-site intelligent monitoring terminal are transmitted to the backstage monitoring host for early warning analysis; and the monitoring terminal comprises a sensor acquisition module, a cable current sampling module, a power taking module and an intelligent monitoring host. With the cable well state comprehensive monitoring and early warning system of the invention adopted, a cable well and the real-time operation state of the interior of the cable well can be monitored, comprehensive monitoring of the actual operation state and operation environment of the cable well can be realized, and potential hidden dangers and emergencies of the actual operation state and operation environment of the cable well can be timely warned against.