Method for determining coal rock maceral components of coking coal

The invention discloses a method for measuring coal rock macerals of coking coal. The method comprises the following steps: 1, preparing a pulverized coal polished section; 2, calibrating the reflectivity; 3, collecting a coal rock microscopic image as an original image; 4, processing the original image to obtain a pulverized coal particle image, and segmenting the pulverized coal particle image to obtain a plurality of independent pulverized coal particle images; 5, determining a vitrinite reflectivity prediction distribution curve of the pulverized coal particle image through the single pulverized coal particle image; 6, calculating a reflectivity distribution curve of an individual pulverized coal particle image, and performing component judgment and clustering on individual pulverized coal particles; and 7, repeating the step 6, clustering the content of the vitrinite, the content of the exinite and the content of the inertinite of all the independent pulverized coal particle images, and counting the clus