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同构识别是机构类型综合中一个重要而又困难的问题，同时，也是图论中非常难解决的问题之一。以往探讨的同构识别方法均为纯低副平面运动链，对含高副平面运动链的同构识别，目前还没有一种方法．本文首次提出一种对含高副平面运动链进行同构识别的方法，该方法速度快、工作量少，经大量实例计算，该方法是一种行之有效的好方法，且运动链杆件数越多，其优势越明显．
Isomorphism identification is an important and difficult issue in the synthesis of institutional types. At the same time, it is also one of the most difficult problems to solve in graph theory. In the past, the isomorphic identification methods are all purely low-plane motion chains. At present, there is not a single method to identify isomorphic motion chains with high secondary plane motion. This paper presents for the first time a method of isomorphic identification of high kinematic chains with high secondary planes. The method is fast, less work-intensive, and is calculated by a large number of instances. This method is a good and effective method, The more the more obvious its advantages.