Abstract: In recent years, with the continuous development of social economy, the requirements of road and bridge engineering are constantly improved. At present road and bridge engineering is facing many problems, among which cracks caused by improper design become the main factor affecting the safety of bridge engineering, therefore, it is necessary to strengthen the control of cracks during construction to ensure the quality of road and bridge. Based on this, this paper discusses the measures to solve the problems of road and bridge design, analyzes the causes of road and bridge cracks, and puts forward effective methods to solve the problems of road and bridge cracks.