Introduction: The present research was conducted with the aim of investigating the relationship between the establishment of safety, health and environment management system on the performance of coking complex employees and refineries of Iranian Zarand Steel Company. Therefore, at first, the dimensions and issues of establishing the safety, health and environment management system and the performance of employees were identified, and then the relationships between the identified variables were presented. Materials and Methods: Two standard questionnaires were used to collect data related to the measurement of research variables, which in total include 2 structures, 3 dimensions, and 20 questions. The content validity method was used to check the validity of the questionnaire. Cronbach's alpha coefficient was calculated as 0.863, which indicated the reliability of the questionnaire. The statistical population of this research includes the employees and experts of Iranian Zarand Steel Company. After ensuring the validity and reliability of the designed scales based on the calculations, the questionnaires were distributed to a sample of 260 people. To check the demographic data, descriptive statistics, K-S test to determine the normality of the data using SPSS24 software, to determine the construct validity using the confirmatory factor analysis test and for the relationships between the variables using the structural equation model using statistical software 3 SMART-PLS was performed. Results: The establishment of the safety, health and environment management system on the performance of employees with a factor load of 0.623 and the T-statistic of the test 9.803, as well as the safety, health and environment management system on the dimensions of employee performance, including increasing knowledge and quality of work, a better relationship with Colleagues, improvement of individual characteristics, development of skills and better supervision, improvement of creativity and improvement of customer orientation of Zarand Iranian Steel Company with factor loading of 0.555, 0.664, 0.430, 0.436, 0.424 and 0.461 respectively and the T-statistics of the test have a significant relationship of 8.086, 12.337, 5.069, 5.792, 5.055 and 6.629. Conclusion: The findings show that the establishment of the HSE management system has a significant effect on the performance of employees and its dimensions, including the quality of occupational health and safety rules, practical compliance with the law, management and cooperation, workplace processes, the use of personal protective equipment and empowering the behavior of managers and employees.