Objective: To explore the application effect of a continuous precision nursing model based on the KANO model in patients with threatened abortion and evaluate its improvement on patients’ clinical symptoms, psychological state, and sleep quality. Methods: A total of 100 patients with early threatened abortion admitted to the hospital from January 2023 to December 2024 were randomly divided into a control group and an intervention group, with 50 cases in each group. The control group received routine nursing, while the intervention group received continuous precision nursing under the guidance of the KANO model. The improvement time of clinical symptoms, changes in the Self-Rating Anxiety Scale (SAS), Self-Rating Depression Scale (SDS), and Pittsburgh Sleep Quality Index (PSQI) scores were compared between the two groups. Results: The intervention group had significantly shorter times for cessation of vaginal bleeding, relief of abdominal pain and low back pain, and total hospital stay compared to the control group (P<0.05). After the intervention, the SAS, SDS, and PSQI scores in the intervention group were significantly lower than those in the control group (P<0.05). Conclusion: Continuous precision nursing based on the KANO model can effectively promote symptom relief, improve psychological state, and enhance sleep quality in patients with threatened abortion, demonstrating its value for promotion.