国际工程承包是一项风险和利润并存的事业 ,各种意想不到的事件难以完全避免。在诸多风险中 ,由于工程所在国通货膨胀和货币贬值等原因而导致劳务费、材料费及货币间的汇率变化 ,引起承包商合同造价的变化 ,可能使工期较长工程的承包商遭受巨大损失。为避免由此而带来的风险 , International project contracting is a business where risks and profits coexist. Various unforeseen events can not be completely avoided. Among many risks, changes in labor costs, materials costs and currency exchange rates due to inflation and currency devaluation in the countries where the projects are located have caused contractor contract costs to change, which may result in huge losses to contractors with longer construction schedules. To avoid the resulting risks,