Depression is one of the most difficult problems in adolescent physical and mental health. At present, there are more than 50 million people suffering from depression in China, among which adolescents account for 20 percent. In recent years, the harm of depression to adolescents has become more and more serious, which is specifically reflected in the following aspects: the number of adolescents suffering from depression is increasing year by year, the average age of adolescent depression patients is declining, and the number of undiagnosed but depressed adolescents has increased significantly. School social workers have unique advantages in students' mental health. They can help students establish good values and self‐cognition through resource links and positive psychological guidance.