作为《说文解字》（以下简称“《说文》”）字头的小篆字形在汉字发展史上地位崇高，而用楷书字形转录小篆字头的做法也十分普遍。做好《说文》对应楷书字形的标准化工作，对促进《说文》的研究整理工作和印刷通用字字形总体规范都有重要意义。本文以习近平新时代中国特色社会主义思想和科学的汉字构形学理论为指导，深入考查ISO 10646通用字符集中与《说文》字头相对应的楷书编码字形，从对应关系中发现问题，并寻求相应的解决方案。 在字头与楷书编码的对应关系方面，二者的参差矛盾的表现形式是多样的。其中部分字头缺乏对应的编码字形，部分字头对应了多个编码的同一个字形，部分字头又对应了一个编码内部的多个字形。更多字头则是对应着多个楷书编码的多个不同字形。 在多个楷书编码字形之间的差异状况方面，本文将其分为传承字和隶定字两大类，从各自的内部差异和二者之间的关联等角度来分别探讨。传承字内部存在着新旧字形以及其他一些笔形层面的差异，而见于《说文》说解的传承字相对于字头的隶定字则存在构件的差异；隶定字内部的差异来源于小篆字头、楷书转写和字符集制定等多个层面，而隶定字相对传承字则面临着覆盖率不足的问题。 在字形优化的建议方面，本文依据测查结果和汉字优化理论，重新审视字形优化的原则，并在此统领下明确了《说文》字头对应楷书字形的优选细则，有望使楷书编码字形对《说文》字头的转录更加规范。

Shuowen Jiezi is valuable, regular script is useful. It is meaningful to standardize corresponding regular script of small seal script, whether for research of Shuowen or standardization of Chinese character. The thesis is under the guidance of scientific theory of Chinese character configuration, checking the corresponding relation of Shuowen Jiezi and corresponding regular script in Universal Character Set (ISO 10646), finding out problems and seeking for solutions. In the level of corresponding relation, it is noted that the relationship of two scripts is uneven. Some part of small seal script lacks of corresponding kaishu. Some part of small seal script corresponds to single regular script in multiple codes, while some part corresponds to multiple scripts in a single code. Most small seal script corresponds to multiple regular scripts in multiple codes. In the level of difference on multiple regular scripts, the thesis seperates the scripts into two categories: inherited script and transliterated script. The two kinds of categories show both differences and similarities. Inherited script itself has differences in some strokes, meanwhile it has component discrepancy compared with transliterated script. Transliterated script itself has differences in several historical levels, meanwhile it has rather low coverage rate compared with inherited script. In the level of optimization suggestions, the thesis reexamine principles of Chinese character optimization according to new statistics and theory. The reexamined principles help formulate detailed rules of the regular script optimization and may standardize corresponding regular script in a better way.