The characteristics of China's futures trading margin system are as follows: ① different trading margin ratios are stipulated for different stages of futures contract listing operation, and the margin increases with the approach of delivery. (2) With the increase of contract positions, the exchange gradually increases the trading margin ratio. (3) In case of continuous ups and downs, the proportion of trading margin shall be increased accordingly. (4) When the cumulative increase and decrease of several consecutive trading days calculated according to the settlement price reaches a certain level, the Exchange shall take corresponding measures according to the market conditions. ⑤ In case of abnormal trading in futures contracts, the trading margin ratio shall be adjusted according to the prescribed procedures.