The recent study aimed at investigating and determining threats and weaknesses associated with Nature Schools Development in Iran. The recent research was qualitative. The data from the semi-structured interviews were analyzed using qualitative content analysis. In this method, data were categorized and conceptualized based on perception. This study were conducted with the participation of 15 experts. Participants were selected among Administrators, facilitators and the experts who were master on nature school subject. The participants were selected through purposeful sampling among nature schools specialists in state of Tehran, Khorasan Razavi and Yazd. Selecting contributes with the widest variety has increased the credibility of the data. The research findings were identified in five main groups, including barriers due to the policy framework, not recognizing the experience of nature in childhood, cultural and social barriers, the system failure of research and development, limited financial resources and facilities.