After more than 30 years of development，lottery has expanded sale scale rapidly. The lottery has been highly concerned by publics that needs lottery legislation to establish the legitimacy of lottery. Lottery legislation should learn from the experience of the past 30 years. The law of lottery has to fix lottery’s social function，to improve management institution of lottery，to clarify operation mechanism，to restrict approval authority about lottery，to delimit the use scope of lottery funds，to strengthen the supervision of lottery market. Law of lottery clarifying mentioned above will make lottery market more orderly，will protecting the legitimate rights and interests of participants better，and will safeguard lottery serving as a public welfare and its development more healthy.