Based on the thermoluminescence(TL) data

the ancient dose in volcanic rocks near Huguangyan Maar Lake was calculated with sensitized revise technique.The cumulate dose for 78 d in TL dosimeters placed in grottos was measured

and the annual dose in volcanic rocks was reckoned.Based on the results of the ancient dose and the annual dose

the time of the volcano eruption to form Huguangyan Maar Lake is estimated before about(158±29) ka

and this is consistent with the acknowledged result.The results indicate that the Coarse-grain TL technique can be used for Quaternary period dating if the sensitized effect of quartz is taken into account.