Objective: This study aims to explore the precise intervention mode and early warning systemfor primary school psychological crises, in order to improve students’ mental health level and ability tocope with psychological difficulties. Special attention is paid to how to effectively reduce anxiety anddepression symptoms in students through comprehensive and systematic intervention measures, whileenhancing their social skills and self-regulation skills. Method: A mixed method research design wasadopted, combining quantitative and qualitative research methods. A six-month intervention study wasconducted on 90 students in three primary schools in Chongqing, using standardized mental healthassessment tools (SCARED and CDI) for scoring and collecting qualitative data through feedbackfrom teachers and parents. Intervention measures include individual psychological counseling, groupactivities, family guidance, and school support. Result: This study found that the SCARED and CDIscores of students significantly decreased during the intervention period, indicating an improvement inanxiety and depression symptoms. The case study “Xiaoming” highlights this trend: after personalizedintervention, Xiaoming has significantly improved in emotional management, social interaction, andlearning performance. Conclusion: The research results indicate that the precise intervention modeland warning system for psychological crises in primary school effectively improve the mental health ofstudents. Especially personalized intervention measures have a significant effect on reducing anxiety anddepression symptoms in students, enhancing their social skills and self-regulation abilities.