The invention relates to the technical field of vehicle-mounted communication, and in particular relates to a vehicle-mounted network communication device, including a 4G (4th Generation mobile communication) antenna, a GPS (Global Positioning System)/4G module, a micro-processing unit, a WiFi (Wireless Fidelity) module, a SIM (Subscriber Identity Module) card module, an EEPROM (Electrically-Erasable Programmable Read-Only Memory), a power supply management unit and a battery, wherein the battery, the power supply management unit and the micro-processing unit are sequentially connected; the GPS/4G module is connected to the 4G antenna, the WiFi module, the SIM card module and the micro-processing unit respectively; and the EEPROM is connected to the micro-processing unit. The vehicle-mounted network communication device provided by the invention has WiFi hotspot and 4G network access functions, can access the 4G network and share a 4G signal to users in the vehicle through the WiFi hotspot, and has the advantages of being abundant in function, flexible in arrangement and high in integration level.