Currently, the environmental approach is included in the legal regulations of countries to achieve sustainable development. The development of public policies that demand the care and preservation of the environment is an urgency for the territories. In Ecuador, social and legal transformations led to the inclusion of the environmental perspective in the Constitution of the Republic, and subsequently to the development of the Organic Code of the Environment (CODA). Environmental principles are considered in the various legislations; however, no priority is established among them. The objective of this work is to determine the priority established in the environmental principles of CODA. For this, it was necessary to consult experts and, based on their criteria, the Pareto Diagram technique was applied, the fundamental principles were selected, and a hierarchical order was determined based on the Analytic Hierarchy Process, AHP Saaty, with a neutrosophic approach, for the decision making. The most relevant principles were Comprehensive Responsibility, Best Available Technology and Best Environmental Practices, and Comprehensive Repair. Keywords: Laws, Politics, Environment, Ecuador, Neutrosophic AHP