Navigation system for long-distance towing

The invention discloses a navigation system and navigation method for long-distance towing. The system comprises positioning devices installed on transport ships, positioning devices installed on multiple tugs and servers. The positioning devices on the transport ships and the positioning devices on the multiple tugs are in communication connection with the servers through a wireless network; the positioning devices on the transport ships and the positioning devices on the multiple tugs perform real-time positioning on location information of the transport ships, and the positioning devices on the multiple tugs perform real-time positioning on location information of the multiple tugs; the positioning devices on the transport ships and the positioning devices installed on the multiple tugs send the location information of the transport ships and the location information of the multiple tugs to the servers in real time, the servers determine the positions of cargos on the transport ships according to the location information of the transport ships and the location information of the multiple tugs, and an early warning is produced according to the positions of the cargos. According to the invention, the early warning is produced through positioning the location information of cargos.