《汉语拼音方案》是拼写汉民族共同语的拼音方案。自它被公布施行至今,得到了国际社会的普遍认可与运用。但是《汉语拼音方案》在运用过程中也存在着一些不尽如人意的问题,有一定的局限性。对于《汉语拼音方案》的一些有待完善的方面,已经有人作过一些研究,这些成果为我们正确认识《汉语拼音方案》的局限提供了很好的借鉴。本文将对字母表、声母表、韵母表、声调符号、隔音规则、省略规则这些方面存在的不足加以进一步说明。 “Hanyu Pinyin Scheme” is a Pinyin scheme that spells the Han nationality common language. Since its promulgation and implementation till now, it has been universally recognized and applied by the international community. However, there are some unsatisfactory problems in the application of “Hanyu Pinyin Scheme”, which have some limitations. Some studies on the areas to be perfected in the “Hanyu Pinyin Scheme” have been made. These achievements provide a good reference for our understanding of the limitations of the Hanyu Pinyin Scheme. This article will further explain the shortcomings of the alphabet, initials, vowels, tone symbols, sound insulation rules, omitted rules.