本文探讨了无约束手写体数字的分割与识别方法，并结合一类支票的动态密码关系建立了一个比较实用的识别系统原型。文中的分割方法结合了连通域方法和投影方法，解决了连笔字符的分割问题。识别系统应用了不同机制的３种独立的识别方法，基于不同的特征，３种识别方法的结果具有较好的互补特性。基于较高单字识别率的３种识别方法，利用容错技术，本文建立的支票识别系统达到了接近实用的水平。 In this paper, we discuss the method of segmentation and identification of unconstrained handwritten digits, and establish a more practical prototype of the recognition system combined with the dynamic password of a type of check. The segmentation method in this paper combines the connected-domain method with the projection method to solve the segmentation problem of continuous-stroke characters. The recognition system uses three independent recognition methods with different mechanisms. Based on different features, the results of the three recognition methods have good complementary characteristics. Based on the three recognition methods of higher word recognition rate and using fault-tolerant technology, the check recognition system established in this paper reaches a level close to practicality.