In recent five years，Beijing has ranked the third in the number of cases of false information on the Internet in China. The dissemination of false information on the Internet is in urgent need of criminal law regulation. We should strengthen the theoretical research on the criminal law boundary of false information dissemination on the Internet，and correct the practices that are used to but wrong in practice. The scope of “false information” should be defined by applying the revised criminal law. Even if the content of false information is not true，it should not be regarded as false information in criminal law. Taking Internet defamation as a case of private prosecution will lead to ineffective punishment and ineffective regulation. In practice，the handling of cases often fails to meet the evidence standard of such cases，leading to some behaviors escaping criminal punishment.