Evidence-based approach, as an inter-discipline and approach between law and evidence-based science, inspires both the interest and the initiative of the law community to further explore and deepen its application in law research and legal decision-making by its outstanding characteristics of empirical and rigorous study.The paper focuses on the definition of the evidence-based law in Chinese law context and its reason behind and evidences below, the connotation and denotation of the evidence-based law concept, its methodological characteristics and meanings for social science research especially law. It concludes that the Chinese name of the evidence-based law is based on the consideration of both the scientific criterion and linguistic facts of the concept definition of new inter-disciplinary subjects and approaches such as the law and economics etc. which have happened in the law field;the evidence-based law approach is an inter-disciplinary paradigm with features such as scientific methodology, targeted objects and systematic knowledge etc.;the evidence-based law approach shows not only the general meaning to the evidence-based legal decision-making, but also some specific practical and theoretical significance?to the rule of law with Chinese characteristics; influenced by the unceasing development of the evidence-based approach firstly in medicine then in social science, Chinese law arena will gradually introduce the evidence-based law approach in analyzing and evaluating legal issues and making legal policies in the near future.