Economic growth and development is one of the most important goals of countries, and it is necessary to create and expand economic activities, and the most important prerequisite for economic activities is to create and develop a suitable business environment. Therefore, the purpose of the current research is to identify and prioritize the requirements for improving the business environment in Iran. The current research approach is based on a mixed method, which is done in the form of qualitative and quantitative analysis and the framework of a deductive-inductive approach. The studied sample included 20 experts in the qualitative section and 35 experts in the quantitative section. After conducting interviews and analyzing the themes, 40 main themes were identified, and 34 final themes were identified by applying experts' opinions. The fuzzy Delphi method was performed in two stages to check the verifiability and prioritization of the themes. The research findings show that the most important requirements for improving the business environment in Iran are: increasing political stability, promoting governance policies through open and participatory approaches, smart and evidence-based economic policymaking, developing the role and position of economic activists in international and regional competitions, expansion of economic freedoms and changing the role of the government from administrator and trustee to coordinator and regulator, increasing the level of investment through the attraction of domestic and foreign capital, paying attention to the legal requirements of trade and developing the knowledge and skills of capital human.