Abstract: Whether sports improper behaviors can be regulated effectively or not determines the future of sports development.The current existing theoretical researches and regulatory experiences, which mixed up the regulation categories and methods, not only lose control of regulating sports improper behaviors, but also show a deteriorated trend when the new types of improper behaviors are regulated.A good governance of sports improper behaviors are tried to be achieved by establishing the fields and objects of law and morality governance in modern governance context.It is found that the overemphasis on one kind of conduct does not do good to regulating sports improper behaviors effectively.Furthermore, it brings the doubts of rationality and legitimacy itself.The improper behaviors in sports competitions should be governed by laws, moralities and sports rules at the same time.Four reasons are found to cause the current failures, that is, sports legal issues are moralized, moral regulatory skills legalized, behavior regulatory effect range misunderstood, and moral and legal governance imbalanced.Three solutions are put forward as follows: the nature of an undecided sports improper behavior should be defined, the range of dealing methods restricted, and a remedy regulatory system to deal with those disputed cases created.In a word, starting with the nature of sports improper behaviors, an effective regulation of sports improper behaviors are achieved top-down by laws, morality and rules to frame the fields of these improper behaviors.