Abstract: With the development of economic level and construction technology, higher requirements are put forward for the construction of public infrastructure. The construction of roads, bridges and tunnels has promoted the development of public life and society. In the construction of infrastructure engineering, the construction department needs to do a good job in the overall construction management of the project according to the environment and technical application, so as to ensure the safe construction of the project. However, the construction of public infrastructure will be affected by geography and environment, which makes the specific construction difficult. Therefore, this paper analyzes the problems and technologies in the construction of roads, bridges and tunnels, and puts forward targeted measures according to the common construction difficulties.