Objective: To analyze the impact of de-escalation techniques in reducing violent behaviors in the nursing management of mental disorder patients in outpatient clinics. Methods: A total of 214 mental disorder patients who visited the clinic from June 2024 to November 2024 were selected as samples. 107 patients admitted from June to August were assigned to the control group, and 107 patients admitted from September to November were assigned to the study group. The study group received de-escalation intervention, while the control group received routine intervention. Both groups were evaluated using the Chinese version of the Brøset Violence Checklist (BVC) to compare the incidence of violent attack behaviors, BVC risk proportion, and the satisfaction of escort unit staff towards outpatient clinic staff before and after intervention. Results: The incidence of violent attack behaviors in the study group was lower than that in the control group, but there was no significant difference (P > 0.05). There was no difference in BVC risk level between the study group before intervention and the control group (P > 0.05). The BVC risk level in the study group after intervention was lower than that in the control group (P < 0.05). The BVC risk level in the study group after intervention was lower than that before intervention (P < 0.05). The satisfaction of the escort unit staff in the study group was higher than that in the control group (P < 0.05). Conclusion: The application of de-escalation techniques in the nursing management of mental disorder patients in outpatient clinics, combined with targeted management based on BVC assessment, can effectively reduce violent behaviors and lower the risk of violence occurrence.