Based on the three-echelon supply chain composed by the manufacturer, wholesaler and retailer, this dissertation will discuss the changes of sales volume, price, wholesale price and other factors under two kinds of conditions, one is different members play dominant part and another is the members sign a revenue sharing contract .And then we can know the fact that the members of the supply chain who signed a contract earn far more profits than those who didn ’ t.Hence, it is completely feasible for members of the supply chain to sign a contract to obtain the same profits .%基于由制造商、批发商和零售商组成的三层供应链系统，分别考虑不同成员处于主导地位和各成员之间签订收入共享契约这两种情况下，对商品的销售量、价格和批发价格等因素的影响进行了研究，通过理论分析和仿真可知，供应链上各成员通过签订契约获得的利润要远大于没有签订收入共享契约的利润。因此，在供应链上各成员之间通过签订契约来获得相同利润的情况是完全可行的。
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