Stock index futures are the stock index as the subject of the financial futures. Since the birth of 1982,the stock index futures had grown very rapidly，and the size of transactions had increased. It is a very important tool which is derived from the stock market now. With the nice development of securities market in china, in order to obviate the system risk about the stock market and meet the need of making the securities market active, the stock index futures in China also will come into being. The problem about the stock index futures is the focus in the stock market now. As a new financial tool, what influence will have after the stock index futures’ loading? What conditions will be needed?
KEYWORDS：stock index futures background development influence reason condition
