Safety ergonomics is a subject that studies the relationship between man and machine from the perspective of safety. Its foothold is on safety, and its purpose is to protect human nature in the process of activities. This paper mainly expounds what kind of man-machine relationship can ensure human safety. In other words, how to achieve a certain production efficiency while ensuring people's safety, health and comfort to the greatest extent. This is mainly based on the physiological, psychological and biomechanical needs and possibilities of actors, focusing on the mechanism that people can protect themselves from external factors to the greatest extent while achieving certain activity efficiency in the process of production or other activities, so as to provide scientific basis for the standards and methods of preventing and eliminating hazards, so as to achieve the purpose of safety and hygiene and ensure that human beings can engage in various activities under safe, healthy, comfortable and pleasant conditions and environments.

Safety ergonomics focuses on the safety of people and machines, reducing mistakes and relieving fatigue.

The research contents of safety ergonomics generally include:

1. Study the division of labor and mutual adaptation between man and machine. According to their own characteristics, the division of labor should give full play to their respective advantages and achieve the goal of high efficiency, safety, comfort and health.

2. Study the information transmission process. People and machines need to constantly transmit information during operation, so various displays and controllers on the machines should be designed to be suitable for people to use.

3. Study the working environment and create safe conditions. There are various environmental conditions in the workplace, such as high temperature, high humidity, vibration, noise, harmful substances in the air and the situation in the workplace. All these factors will affect people's health. The goal of safety ergonomics research is to control these factors within the prescribed standard range, so that the environmental conditions meet people's physiological and psychological requirements and the operators feel comfortable and safe.

4. Study safety devices. Many devices have "dangerous areas". If there is no safety device, barrier, partition and shell to separate the dangerous area from the human body, it may cause harm to people. Therefore, designing a reliable safety device is the task of safety ergonomics.

5. Choose the right operator. The individual differences of people make the operators adapt to the work differently. In terms of personnel arrangement, it is necessary to study the coordination of man-machine relationship, so that people can perform their duties, which is conducive to safe production.

6. Study the characteristics of operator fatigue in the production process and the measures to reduce fatigue and tension.

7. Study the reliability of man-machine system to ensure the safety of man-machine system. Study the prevention of accidents and the control of dangerous situations.