The real life of a prison is very complicated because it is affected by many factors such as the type, size, management and maintenance of the prison, as well as the personal situation, background and criminal behavior of the prisoners. Generally speaking, a prison was a place to punish and reform criminals, in order to help them correct their mistakes and reintegrate into society. However, life in prison was often very difficult. Prisoners had to endure great pressure and restrictions and were treated unfairly. Prisoners in prisons in many countries were often subjected to violence, abuse, bullying, sexual assault, drug trafficking, gambling, and other immoral acts. In addition, many prisoners suffered from diseases, malnutrition, lack of rest and health care in prison. Therefore, it is very important to understand the real life in prison to help us better understand the difficulties and challenges experienced by prisoners and to ensure that we can better provide them with support and help.