Abstract: This paper introduced three digital nondestructive testing technologies during the construction of long-distance pipelines, summarized and organized the quality problems commonly encountering in quality inspection of fully automatic ultrasonic testing (AUT), phased array ultrasonic testing (PAUT), and X-ray digital imaging testing (DR), provided typical images or graphs, analyzed the factors affecting data validity, and proposed corresponding corrective measures, which could be used as a reference for nondestructive testing project management and internal control.