A method for measuring surface intercellular spaces of baked tobacco leaves by means of software Photoshop is characterized that the method is a quantitative method provided for evaluation of structural indexes of the baked tobacco leaves and including: acquiring a 450-times multiplied image of a surface cell structure of initially-baked tobacco leaves by the aid of a scanning electron microscope, reading total pixel value of the image by the Photoshop software, selecting an intercellular space portion accurately by means of a magic wand, a masking, a brush, an eraser and the like, and computing surface intercellular space rate of the tobacco leaves by the ratio of pixel value of the intercellular space portion to the total pixel value of the image. The method for measuring surface intercellular spaces of the baked tobacco leaves has the advantages that by acquisition of the scanning electron microscope and processing of the Photoshop software, quantitative data of the intercellular spaces of the tobacco leaves are acquired so as to evaluate the structure of the tobacco leaves objectively. According to continuous multi-times measuring results of tobacco leaves from different production places, the method is high in accuracy, the variation coefficient of the measured results of the same sample is kept within 2.5%, and fit goodness of the evaluation results and the judgment results of specialists is high (R2=0.98).