Objective: To analyze the positive significance of employing hysteroscopy and B-ultrasound together in diagnosing uterine incision diverticulum after cesarean section. Methods: The study was conducted at the Shaanxi Provincial People’s Hospital from February 2023 to February 2024. A total of 100 patients, all with a history of secondary cesarean section, were selected as research subjects for this experimental study. The selected patients were divided into two groups: the experimental group, who received a diagnosis through hysteroscopy combined with B-ultrasound diagnosis, and the control group, who underwent vaginal ultrasound diagnosis. Each group comprised 50 patients. The detection of uterine incision diverticula using the two methods was analyzed. Results: The combined diagnostic method of hysteroscopy and B-ultrasound in the experimental group revealed higher length, width, and depth measurements of uterine incision diverticulum defects post-cesarean section compared to the diagnostic method of the control group (P < 0.05), indicating a better diagnostic effect. Conclusion: Upon observing the recovery of patients after cesarean section, the diagnostic method involving hysteroscopy combined with B-ultrasound yielded superior results. This method enhances diagnostic accuracy and enables the identification of patients’ incisional diverticulum, facilitating proactive intervention. Its significance is noteworthy and merits promotion.