In the wave of information technology development in the new era of social development,many industries in China have achieved rapid development and progress.Since the cancellation of provincial toll stations on highways in 2020 and the implementation of nationwide networked toll collection,higher requirements have been put forward for the network security of highway networked toll collection systems.The network security of toll collection systems directly affects the collection of tolls,involving the interests of the general public and the country.It has become the key to the normal management of highways and the normal operation of business systems.Based on the current development status of highways and the development of network security services in Yunnan's highway toll collection system,this paper explores the future development trends and maintenance ideas of network security.