With the development of the world economy, the country's economy is also developing steadily. Financial fraud has become the most common and difficult to eradicate problem in the securities market, which not only has a bad impact on the capital market, but also is the biggest hidden danger in the securities market. Financial fraud not only causes losses to investors, but also has a negative impact on the resource allocation of the financial market and reduces the credibility of the market. For financial fraud, different countries have their own legal regulation and punishment methods. In this regard, the paper will analyze the legal regulation of financial fraud from the perspective of different cases in China and the United States, and use empirical research methods to analyze the efficiency of the results of different legal regulation to solve the fundamental problems.