精神障碍出院患者自杀风险远高于普通居民和其他疾病患者，但我国尚缺少出院后自杀风险干预服务。简短联系干预是世界卫生组织推荐的、能在精神卫生服务资源有限地区有效降低自杀风险的低成本干预措施。确定降低我国精神障碍出院患者自杀风险的最佳干预频率，评估干预的实施效果是将干预转化为社区精神卫生服务日常工作的难点。本研究拟基于简短联系干预理论，建立精神障碍出院患者简短联系模式，形成干预策略；通过实施科学实施结局框架，以序列多次分组随机试验为核心，结合定性研究方式，确定降低精神障碍出院患者自杀风险的最佳干预频率，评估干预策略的实施过程、结果及其转化为日常工作的可行性和可持续性，为创新我国精神障碍出院患者自杀风险管理模式提供科学依据，同时也为实施科学在精神卫生中的应用奠定基础。

The post-discharge suicide risk of psychiatric patients is significantly higher than it among general population and patients with other diseases. Currently, there lacks interventions for post-discharge suicide in China. The World Health Organization recommend the low-cost brief contact interventions (BCIs) for reducing the risk in areas with limited resource of mental health service. To embed BCIs into routine work in community mental health service, it is critical to determine the best frequency to contact patients and the effects of implementation. Based on BCIs, this study aims to develop an interventional strategy against post-discharge suicide for Chinese psychiatric patients; then, based on the Implementation Outcome Framework and Sequential Multiple Assignment Randomized Trial, this study also aims to determine the best frequency of BCIs, to evaluate the implementation process and outcomes of the strategy, and the possibility and sustainability of routine implementation. Finally, the findings will provide evidence for developing innovative management against post-discharge suicide for psychiatric patients and pioneer the application of Implementation Science in mental health.