It was well known that standard cramp frame can only clamp a group of workpieces,without the ability to catch many groups of workpieces with related position constraint.To solve this problem,a design solution based on TRIZ theory as well as an inven-tive principle were proposed in this study.A bidirectural cramp frame with hyperbolic structure was designed, and it could clamp workpieces on both sides.Therefore,the application range and fields of this new kind cramp frame were expanded.Moreover,the bidirec-tural cramp frame was also analyzed and optimized using the finite el-ement method.Finally, simulation results showed that both the bearing capacity of the bidirectural cramp frame and its stress distri-bution were improved.%标准弓形夹只能夹持单组工件，而不能夹持多组、有相对位置要求的工件，其应用范围受到限制，针对这一问题，利用 TRIZ 理论寻求解决方案，设计一种具有双曲线结构的双向弓形夹，可双侧夹持工件，扩大弓形夹的应用范围，并对双向弓形夹受力状态进行有限元分析，结果证明弓形夹所受应力分布较均匀，夹持能力得到显著提高。
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