The stepwise regression method was used to analysis the sunshine duration,the latitude longitude and sea level elevation of 20 weather stations in the Tarim basin during 36 years from 1961 to 1996.A calculating model of annual sunshine duration along the Tarim oil gas pipeline was given.Annual sunshine duration with different probabilities at the solar energy power stations of the middle station of the pipeline was estimated in terms of the extreme distribution probability model,and the distribution feature of annual sunshine duration in the Tarim basin was described.The extremes of annual sunshine duration once every 30,50 and 100 years were referred to as the designed value in the project of solar energy power station.These values are of importance in the development of the oil gas resources at the Tarim oilfield.