Mexico has a civil law legal system. The civil law system is based on a comprehensive set of codified laws and statutes that form the basis of legal principles and regulations. It originated from Roman law and is prevalent in many countries around the world, particularly in continental Europe and Latin America.

In the civil law system, laws are primarily written and enacted by legislative bodies, such as the Mexican Congress, and are organized into codes that cover different areas of law, including civil, commercial, criminal, administrative, and constitutional law. These codes provide detailed rules and regulations that judges apply when deciding cases. Judges in the civil law system have the role of applying and interpreting the law rather than creating legal precedents through their decisions.

The civil law system emphasizes the importance of legal certainty, clarity, and predictability. Legal reasoning in this system relies heavily on the interpretation and application of statutes and codes, with less emphasis on judicial precedent. While judicial decisions are not binding on future cases, they can serve as persuasive authority.

In Mexico, the civil law system is influenced by other legal traditions as well. For instance, some indigenous communities may apply their own customary laws alongside civil law principles, creating a form of legal pluralism in certain regions. Additionally, Mexico's legal system is also influenced by international treaties and agreements, such as those related to human rights and trade.

Overall, Mexico follows a civil law legal system characterized by codified laws, statutes, and the application of legal principles derived from legislation.