Abstract: During the long-term operation of the pressure pipeline, its wall is easy to be thinned by the chemical corrosion with the internal and external media, which will affect the industrial production. In the conventional corrosion measurement, the cladding layer needs to be removed, thereby causing a certain waste of human and material resources. Aiming at this phenomenon, this paper proposes a method for measuring corrosion of pipelines without dismantling the cladding layer based on DDA detection technology. The measurement accuracy of this method was analyzed by a series of tests, and then the improvement measures and further research directions were proposed.