Abstract: Mineral prediction uses the geologic metallogenic theory,on the other hand,and combines fully geological,geochemical,geophysical and remote sensing data,and so on.There is a certain degree of uncertainty in the processing and the prediction of information.Therefore,it is important for ore prediction and mining industry economics that estimates correctly uncertainty.This paper analyzes the source of uncertainty in mineral resource prediction and general evaluation method,and proposes a general method of uncertainty evaluation for mineral resources prediction taking Gan North Lengshuikeng ore field as an example,which starts from two aspects of the internal factors and the forecast of geological factor.The methoed get a good result which consistent with the actual geological conditions for five prospective area,therefore,verify the validity of the evaluation method and the feasible of three dimensional prediction method.