Based on the delimitation of the moraine in the Nyainqentanglha Mountains and the isotopic dating of moraine deposits, the writers have found that the oldest moraine deposit was formed during 0. 7~0. 6 Ma BP. This result indicates that the Nyainqentanglha Mountains began doming since the Middle Pleistocene, that glacier denudation occurred cosmically in the highest region, and that high moraine platforms were formed in large areas. The Nyainqentanglha Mountains domed rapidly again during 0. 2~0. 14 Ma BP; the high flanking moraines just protruding great ravines were accumulated. The Nyainqentanglha Mountains domed in miniature again during 0. 07~0. 03 Ma BP; the flanking moraines and terminal moraine knaps were formed in great ravines. There are still miniature glacial movements during 0. 01 Ma BP. The glacier denudation in the highest region of the Nyainqentanglha Mountains reflects the doming process of the mountains, which can be well compared with the doming of the Qinghai-Tibet Plateau. The doming of the mountains should also be seen as the response of the doming of the Qinghai-Tibet Plateau.