Abstract: An empirical study of 224 employees with different work experience in different occupations was conducted by means of questionnaires, which verified the inverted u-type relationship between the frequency of helping people's behavior and work well-being, indicating that the gain-assisted behavior promotes work happiness, and the loss-oriented helper behavior inhibits work well-being. At the same time, the adjustment effect of the team cohesion is verified. The results show that the team cohesion adjusts the opening size of inverted u curve. When the team cohesion is low, the curve opening becomes smaller, and the influence of the helper behavior on the helper's work well-being is strengthened. When the team's cohesion is high, the curve opening becomes larger, and the influence of the helping behavior on the helper's work well-being is weakened.

Key words: helping behavior, work well-being, team cohesion, inverted u curve