The utility model relates to an on-site mixed explosive-charging supervising device based on an Internet of things, which belongs to the technical field of automated management systems. The device comprises a control box and a ground management part, wherein the control box comprises a PLC (Programmable Logic Controller), a touch screen, an RFID (Radio Frequency Identification) electronic tag, an RFID reader-writer, a network camera, a wireless data transceiver and a GPS (Global Positioning System) positioning instrument; and the ground management part comprises a main control computer and an RFID reader-writer. The on-site mixed explosive-charging supervising device has the advantages that: the on-site mixed explosive-charging supervising device is applicable to on-site mixed explosive-charging trucks in different types and with different control systems, and the video monitoring, the position monitoring and the dosage monitoring of the on-site mixed explosive-charging trucks can be realized. Through the technology of the Internet of things, the concrete situations, such as the position, the surrounding environment and the like of each on-site mixed explosive-charging truck can be sensed by a ground management center.