Background: Absolute dating is the key technical issue of Quaternary glacial research.Optically stimulated luminescence（OSL） has been increasingly applied to Quaternary glacial dating in recent years.However

problems such as insufficient bleaching

low luminescence sensitivity

high thermal transfer effect

etc

still remain.Purpose: In order to investigate the applicability of equivalent dose（De） determination of glacial sediments by different OSL methods

six samples were collected from the Yingpu Valley of eastern Qinghai-Tibetan Plateau（two samples from modern glacial sediments

three from moraines and glacial terrace attributed to Neoglacial and one from a moraine attributed to the last glaciation）.Methods: The Des were determined by SAR combined SGC technique

using three methods: quartz large aliquot（6 mm） BSL

small aliquot（2/3 mm） BSL and polymineral IRSL.Results: Des determined by SGC are consistent with Des determined by SAR protocol.Comparison of three methods shows that IRSL De>large aliquot BSL De>small aliquot BSL De.Des of polymineral IRSL are obviously higher than quartz BSL.Conclusions: It is obviously that feldspar is more difficult to reset than quartz

thus is not suitable for dating glacial sediments in this region.Quartz large aliquot method is suitable for well bleached glacial samples.Due to the low luminescence sensitivity of quartz

small aliquot method showed poor luminescence characteristics.Moreover

this method cannot distinguish the poor bleached grains in this measurement.However

it is possible that quartz small aliquot

even single grain method could be used to date older or brighter glacial samples.More works are required to solve the problems we have encountered in dating low sensitivity glacial sediments.