According to the use of the opening shielding in China, the paper indicates the technical features and factual implementation for the design of the front shield of the open shielding, and introduces the structural calculating methods and ideas for the main parts of the front shield of the opening shielding, so as to provide some necessary foundation for the general design of the opening shielding.%根据敞口式盾构在我国的实用情况，论述了敞口式盾构前盾设计的技术特点和具体的实施方式，介绍了敞口式盾构前盾主要部件的结构计算方法和思路，为敞口式盾构整体设计提供了必要基础。
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