近几年以来，国家基础设施建设投资力度的加大 以及西部大开发战略的实施，装载机和挖掘机这两种 机械得以迅猛发展，但是两者发展的境遇却有所不同。 究竟挖掘机能在多大程度上替代装载机？今后的发展 趋势又是如何？ In recent years, with the increase of investment in national infrastructure construction and the implementation of the strategy for the development of the western region, the two kinds of machinery, such as loaders and excavators, have been developing rapidly. However, the development of the two has been somewhat different. To what extent can excavators replace loaders? The future trend of development is how?