Abstract: This paper is a report on the ecological study of alashan redstart(Phoenicurus alaschanicus)during its wintering.The data show that the wintering period is about 180 days,namely,the redstarts arrive at the observed place on the 13—18th of October and fly away on the 14—20th of April.The average value of line transect census is 1.7 per hour in two years,and thequantitative distribution is higher in November but lower in April.In this place,the food forredstart in winter time is mainly made up of common seabuckthorn(Hippophae rhamnoides).