A feature extraction of edible oil FTIR based on fractal geometry is proposed and theoretical calculation formulas of fractal dimension are introduced in this paper.The calculation method of box-counting dimension based on FTIR is analyzed.Through the comparison of FTIR fractal dimensions,the different spectral could be distinguished.Based on the open source computer vision library OpenCV,the FTIR of edible vegetable oils fractal dimension calculation algorithm has been finished.Taking the corn and sesame oil as examples.The detecting result indicates that the FTIR of corn oil and sesame oil can be discriminated effectively by the difference of box-counting dimension.