Junior high school students are in an important period of psychological development, and their
self-awareness is high. Prosocial behavior refers to all positive behaviors that meet social expe ctations
and are beneficial to others and society, and prosocial behavior can benefit the recipient and improve the
individual’s happiness, life satisfaction and happiness. Prosocial behavior is more important for junior
high school students, and past studies have shown that peer attachment may play a mediating role in
the impact of peer attachment on prosocial. Personal strengths (e.g., hope, optimism, creativity, vitality)
have been the subject of research for many years, but have been treated in isolation, that is, they have
always been treated as unrelated individual difference variables, so it is of great significance to stimulate
and cultivate individual character advantages and positive potential, especially for individuals in the
lower classes. The regulatory role of personality in peer attachment and prosocial behavior has not been
addressed in previous studies. This study focuses primarily on the mediating role of personality strengths
between peer attachment and prosocial behavior.