Cross-market arbitrage is the market arbitrage behavior with lower risk,stability and possibly obtainable profits.With the typical futures of metal bronze as an example,the theoretical and empirical analyses are carried out about the operational way of arbitrage.And then the operational model of commodity arbitrage with universal and practical significance has been established,and thus offering the breakthrough point and the open point on arbitrage market.Therefore,it is hopeful for investors to get scientific instruction and practical references in judging the possibility of cross-market arbitrage and its risk control.