The principle of prevention as a golden rule in environmental law and its observance brings many benefits in terms of ecological and economic aspects, because the occurrence of environmental damage in many cases is irreparable, and in case it is compensable, it requires spending a long time and money. based on this, the author, using the descriptive-analytical method and using library resources, seeks to find an answer to the question that basically, what is the position of the principle of prevention in Iran's environmental regulations and whether according to Current environmental regulations in Iran, can the existing laws be used in order to apply the principle of prevention? It seems that the application and implementation of the principle of prevention through the establishment of some prohibitions and restrictions and the establishment of requirements such as compliance with environmental standards, evaluation of environmental effects, obtaining permits and also predicting tariffs are appropriate legal mechanisms that are in the laws The interior of countries, including Iran, is considered to prevent environmental damage.In addition to this, legislators should pay more attention to the benefits derived from this principle in order to properly implement it to other environmental principles, such as: the precautionary principle, the procedure for evaluating environmental effects, and the polluter-pays principle. to provide a suitable guarantee for the implementation of the principle of prevention. Therefore, by delving into Iran's environmental laws, we can find mechanisms that directly and indirectly indicate the emergence and formation of the principle of prevention in Iran's environmental regulations.