Accuracy areal precipitation is one of the key factors influencing the ecological barrier construction and water balance estimation in the Qilian Mountains， but the large difference was found among the current results due to rare measurements especially in the alpine regions. Therefore， total 23 T-200BM3 and 6 TRwS204 weighted rain and snow gauges were installed in the middle-high regions in the Qilian Mountains， together with two precipitation intercomparson fields with elevation of 2 980 and 4 651 m. Based on these measurements and precipitation data measured by the Chinese Standard Precipitation Gauge （CSPG） at 27 stations in or near the Qilian Mountains， the areal precipitation in 2019 and 2020 was estimated after observation error correction and different gauge types unification. The results show that： 1） the averaged observation error is close to 10% at all stations， especially in the alpine regions where the snowfall and precipitation error is about 30% and 20%， respectively； 2） the TRwS204 gauge could observe the “true” precipitation while the T-200BM3 gauge measurement is 12% higher even after disturbance elimination； 3） the annual precipitation increase with elevation in the Qilian Mountains but there may exist one or more indistinctive maximum precipitation elevation in some profiles； 4） the estimated areal precipitation is about 565.2 mm and 446.3 mm in 2019 and 2020， both which is 70% higher than the result that only uses the CSPG data at national meteorological stations， that is， the latter is about 59% of the former which is also close to the downscaling GPM data by using the alpine measurements. Although the result has high accuracy at present， it still has some uncertainties due to rare observation in the southwest high regions in the Qilian Mountains， as well as the low measurement accuracy of T-200BM3 gauges in these regions.