The World Health Organization (WHO) released the Guidelines on mental health at work and published a related ILO/WHO joint policy brief with the International Labor Organization (ILO) on September 28th, 2022. They called on governments and employers to adopt supportive interventions in the fields of mental health and occupational health to protect and promote workers' mental health. Based on these two publications, this article summarizes the main ideas of the guidelines, and reviews the relevant legislation progress of China and international level. Besides, it proposes suggestions for formulating occupational safety and health policies, and promoting mental health at work.