Abstract: Morality is the foundation of legal operations; therefore， the enforcement of mandatory laws depends significantly on actors moral levels. For this reason， the traditional view that a mandatory law is superior to morality is debatable. As has been verified by the historical development of China and the West， morality plays an important role in legal advancement and supportability. The decline of morality in contemporary China has led to frequent legal violations and morality does not play a sufficient role in legal supportability. Traditionally， it could be attributed to the decline of morality， such as the inherent flaws of market economy， unsound law systems， insufficiency of supervision. Such reasons have their own rationality; however， they fail to become the root cause. Only by meeting the demands of human nature and directing the system construction of morality can the morality fitting and guiding the socialist economy be generated， which supposedly exerts an active and supporting effect on law enforcement.

Key words: contemporary China, morality, law, supportability