With the rapid development of economic globalization and the shipping industry, seafarers have been working at sea for a long time, facing psychological problems such as loneliness, depression, and frustration, which pose serious threats to their physical and mental health. The occurrence of psychological symptoms among crew members during their service on board and during their vacations was analyzed through psychological surveys. Research has found that crew members are prone to psychological problems such as obsessive-compulsive symptoms, interpersonal sensitivity, depression, anxiety, hostility, and paranoia during their time on board. The two stages with a relatively high probability of developing psychological problems are: one month and 3-6 months after starting working on board. In response to these issues, some onboard management measures and shore-based support measures have been proposed.

Abstract
1. Introduction
2. Survey questionnaire design
    2.1 questionnaire
    2.2 Distribution and collection of questionnaires
3. Analysis of Investigation and Research Results
    3.1 Basic data statistical analysis
    3.2 Probability analysis of various psychological symptoms
    3.3 brief summary
4. Coping methods and preventive measures for psychological problems
    4.1 Coping methods for mental health issues of crew members during working on board
    4.2 Measures taken by companies to address the mental health of crew members
5. Conclusions
References

• Sun Qianhui(Navigation college, Dalian Maritime University, China)
• Wang Delong(Navigation college, Dalian Maritime University, China) Corresponding author
• Qiu Shaoyang(Artificial Intelligence College, Dalian Maritime University, China)