Based on the analysis of 3 d technology, 3 d stereo image generation method in coal pile measurement was introduced, triangle subdivision process, stereogram generation and hidden processing were conducted, the application effect was studied. The result showed that the effect of 3 d Stereogram generation method was better, coal pile measurement speed and accuracy were improved by 50% and 15% separately compared with traditional method, which provided reference for coal Pile measurement under similar condition.