Long concrete structure is frequently used in modern buildings or structures. As the main measures of achieving seamless construction and crack control of long concrete structure, strengthening strip and after-irrigation-strip have been widely applied. However, compared with after-irrigation-strip, the clear advantage of strengthening strip is closure ahead. Therefore, this paper from aspects of theoretical analysis and engineering application replace the after-irrigation-strip with intermittent strengthening strip in one original design of a project. Since the completion of construction, there are no harmful cracks in the structure. This article also describes the project quality control measures and technical and economic analysis for the design and construction of similar projects.