Abstract: For reasonable development and utilization of heat resources in Yellow River Valley in eastern Qinghai, we analyzed the spatial and temporal distribution characteristics of the first day, the last day, duration days and accumulated temperature with ≥10℃ in Yellow River Valley by using climate tendency rate, moving average method and cumulative anomaly method and so on, based on daily average temperature data in 4 meteorological stations from 1961 to 2015. The results showed that: (1) the eginning date, the ending date, the accumulated temperature and the duration days with ≥10℃ accumulated temperature presented an obviously regional difference in the Yellow River Valley; (2) in recent 55 years, the ≥10℃ accumulated temperature had an increasing trend generally and regional variation was inconsistent in Yellow River Valley; (3) the beginning date with ≥10℃ accumulated temperature advanced while the ending date delayed, and the delaying trend of the ending date was more obvious than the advancing trend of the beginning date; the duration days with ≥10℃ showed an increasing trend; (4) the correlation coefficients between the annual mean surface air temperature and the accumulated temperature with ≥10℃, the duration days and the ending date were significant (P＜ 0.01), but the correlation degrees were different.