Abstract: In the context of the continuous development of construction engineering, concrete has also been widely used in civil engineering construction. Its construction technology is directly related to the construction quality of civil engineering. Therefore, it is necessary to pay more attention to concrete cracks in civil engineering construction and take all-round measures to effectively control concrete cracks. This article first analyzes the causes of concrete cracks in civil engineering buildings, and then explores the related construction and treatment technologies for concrete cracks. Finally, the relevant measures for optimizing the construction of concrete cracks are explained. Carry out to provide an effective reference.