Abstract: The distribution of burden of proof in contract law is a bewildered judicial problem.From the perspective of legislative fact, in contract law of China, norms of evidence include norms of evidence methods which point at contents and forms of contract conclusion, norms of contract claims and defenses, norms of the legal contract facts'presumptions.

Key words: Norms of Evidence, Classification of Legal Requirements, The Contract Law, Burden of Proof

摘要： 合同要件事实的证明责任是案件裁判的疑难问题。从法律要件事实的角度，可以将《合同法》上的证据规范区分为四类：合同形式和合同内容所对应合同成立的证据方法规范、合同请求权及对之为抗辩的证据规范、就合同法律事实中的具体内容加以推定的规范即合同法律事实推定规范。

关键词: 证据规范, 法律要件分类说, 合同法, 证明责任配置