通过研究瑶语勉方言中早期汉语借词的三个问题,发现它的长短元音与等、开合、舒促等的关系不太,正处于消失中,音节结构的简化是消失的动因之一;它借入的源方言是中古时期的南楚方言,兼具古南方和古北方方言的语音特点,与古湘语、桂北平话、湘南土语、粤北土话、粤语、客家话等不完全相同,可能是一个独立的方言;早期汉语借词进入勉方言后,音变向度有同有异,出现了与汉语平行、停滞、转行等的音变结果。 By studying the three problems of early Chinese borrowing words in Yao Mian dialect, we find that the vowel length and vowel length are short of valence, opening and closing, expediting and so on, which are disappearing. The simplification of syllable structure is one of the motivation for vanishing ; It is borrowed from the source dialect Nanchu dialects in the ancient times, both the ancient southern and ancient northern dialect voice features, and the ancient Xiang dialect, Ping dialect in northern Guangxi, southern Hunan dialect, Cantonese dialect, Cantonese, Hakka dialect is not exactly the same, It may be an independent dialect. When the early Chinese loanwords enter the Mian dialect, the sound changes to the same degree and the same result.