This paper has two aims. The one is to delineate tonal alternations of Ka·da-type verb in Korean, and the other is to elucidate the change of tonal alternations based on the corresponding relationship in five korean tonal dialect; Middle Korean, Changwon dialect, Jeongseon dialect, Pyeongchang dialect, and Bukcheong dialect. This paper can be summarized as follows. Tonal alternations of Ka·da-type verb in Korean is irregular. There are two types; H_M-1 type and H_M-1 type. The verbs `Ka·da, Na·da, Ja·da, O·da, Ji·da` belong to H_M-1 type and The verbs `Ju·da, Nu·da, du·da, ha·da` is a member of H_M-2 type. Tonal alternations of Ka·da-type verb in Middle Korean is irregular; When the verb stem is combined with the ending of verb, It`s tone is realized as plain tone, departing tone, or rising tone. and has an irregular paradigm. Later, however, tonal alternations of Ka·da-type verb has changed in Changwon dialect, Jeongseon dialect, Pyeongchang dialect and Bukcheong dialect; Tonal alternations of H_M-1 type are still irregular. but tonal alternations of H_M-2 type is changing regularly and have a single paradigm. Especially in Pyeongchang dialect, tonal alternations of H_M-2 type is completely regular. These changes are subject to change processes such as instability of the departing tone in the tonal system, analogical leveling, and analogical expansion.