本文以恭城瑤族自治縣境內的龍虎鄉客家話為研究對象,以音韻研究為主軸,輔以詞彙進行語言接觸的比較。本論文主要分六個章節,第一章為緒論,說明本文選擇龍虎鄉做為研究對象的動機、目的,及使用的研究方法、步驟;回顧相關文獻並簡述廣西、恭城縣的史地概況,龍虎鄉的語言使用情形。第二章是龍虎客家話的語音系統,介紹聲、韻、調系統和連讀變調、文白異讀的特色。第三章是龍虎客家話與中古音的比較,將龍虎客家話放入歷史音韻的格局中,觀察龍虎客家話從古到今的語音演變及方向。第四章為龍虎客家話的語音特點,是將第三章的內容爬梳後呈現,並藉由跨方言間的共時比較,綜合檢視聲母、韻母及聲調,以探討龍虎客家話的語音現象和演變機制,第五章分兩個部分作探討,一為龍虎客家客家話受語言接觸的借詞現象,將針對龍虎客家人於遷徙過程中,曾經居住過的地區,進行方言詞彙比較及探討;二為龍虎客家話的詞彙特色探討,適時輔以其他方言點詞彙,透過與周邊方言和底層語的比較,得以檢視客家話特徵詞在龍虎客家話的情形,也同時觀察鄰近湘語、贛語的滲透程度以及底層詞在龍虎客家話的保留情況,進而歸納出龍虎話的詞彙特點,第六章結論歸納出龍虎客家話的語音特點及詞彙特色,檢討本研究的不足之處,並提出未來的建議與檢討方針。 ;Longhu Township is located in Gongcheng county, Guilin city. Gongcheng county is located at the northeastern part of Guangxi ,and nears by the district of Hunan Xiang dialect. The interaction between Hakka dialect and the substratum languages is one of the important factors that makes the phonetic changes. This study takes the Hakka dialect of Longhu Township in Yao Autonomous County of Gongcheng as the research object. There are six chapters in this study. The first chapter is an introduction that consists of the motive, purpose, methodology. Review relevant literature and briefly describe the historical and geographical background of Guangxi and Gongcheng County. The second chapter represents the phonetic system of Longhu Hakka dialect that was obtained from the field reseach, including the initials, finals, tones, feature of tonal sandhi, literary and colloquial reading. The third chapter contrasts Longhu Hakka dialect with ancient Chinese phonology to view historical phonetics change. The fourth chapter is the phonetic features of the Longhu Hakka dialect, which is the result of sorting out the contents of the third chapter.In addition, investigate the phonetic phenomena and changes in Longhu Hakka dialect through the synchronic comparison between phonetic system. The fifth chapter is divided into two parts to investigate. The first part is the loanword in Longhu Hakka dialect.In connection with Hakka’s migrationand former residence, Compare and discussdialect vocabularies. The second is that explore the vocabulary features of Longhu Hakka dialect through comparison with surrounding dialects and substratum languages. Finally, understand the local development of Hakka dialects. Also, observe the effect of Xiang and Gan dialects on the Longhu Hakka dialect to summarize the features. The sixth chapter is the conclusion explaining the research achievement and putting forward advices and making a self-critism.