In terms of data provided by ERBE and ISCCP, effects of total cloudiness on earth-atmosphere system absorbed shortwave cloud radiation forcing (SWCRF)are investigated over Qinghai-Tibet Plateau on an annual and a monthly basis separately. It turns out that there is a good power-law correlation between them,and both have obvious seasonal variations. The SWCRF’s geographical distribution accords well with that of the total cloudiness over the region and its value is lower over the main and north parts, and higher over the south east part and the windward side of the west edge.