Insider trading is a serious hazard on the stock market "open, fair and just" Code of Conduct is one of a variety of securities fraud in the most serious kind of crime. With the gradual liberalization of financial, technological advances and financial innovation, China's capital market is expanding and new emerging financial institutions, financial instruments are continuously enriched. All these changes are closely linked and interdependent, has greatly increased the possibility of capital markets, insider trading, but also increases the difficulty of financial regulation. In the future for a long period of time, insider trading will always be a huge potential risk. In this paper, by describing the performance of stock market insider trading, mainly over JP Morgan Case Tang Jian, China's stock market insider trading reveals the causes and hazards, and through the supervision of the domestic stock market insider trading status of the description, analysis of the securities Market insider trading defects, a combination of stock market insider trading case, made insider trading on China's securities market regulatory measures and suggestions for improvement.