本文探應東勢客家話重疊結構和聲調的關係，指出東勢客家話共有十種重疊結構，而在AAA、AAAA、ABAB與ABCABC原四種重疊結構中，具有和一般連讀變調不同的特殊變調；其中AAAA式的變調是一種聲調格套化的韻律變調，而其他三種則具有語法意義，除改變形容司形容程度外，主要的作用更在區別重疊結構中的「詞組」。此外，本文也指出東勢客家話重疊結構在方言比較上的意義：AAA式重疊變調在客家話中雖非獨有但現象頗為特殊，其出現和臺灣閩南語或粵語有關；ABAB和ABCABC式的重疊變調，據目前所知也是東勢客家話所獨有，而可能是東勢客家話和臺灣閩南語接觸互動後的產物。最後，綜合本文及其他應論東勢客家話變調的文章，呈東勢客話的變調類型。

There are ten kinds of reduplicative constructions in the Tungshih Hakka dialect, and four of them bear specific tone sandhi different form ordinary, disyllabic tone sandhi rules. In the reduplication of AAAA, the tone sandhi is based on materiality. However, the tone-sandhi of the other three reduplications, namely AAA, ABAB and ABCABC, is not purely a phonological phenomenon; it also provides some grammatical functions such as changing the intensity of the adjectives or distinguishing phrases form words in reduplication. In addition, this paper attempts to compare the reduplications of Tungshih with those of other dialects, and to point out that the specific tone sandhi of AAA reduplication is related to Yue or to a Taiwanese Southern Min dialect, and that the tone sandhi of ABAB and ABCABC reduplications is probably the result of external influence form Taiwanese Southern Min.