Based on the principle of X-ray stress measurement, the axial stress and the circumferential stress at the top of rock extrusion section of a product pipeline are measured, and the Mises equivalent stress is calculated. Comparing the various stresses of extruded pipe section before and after removing the rock, the results show that the axial stress at 0 o'clock of the rock extrusion section is tensile stress, the circumferential stress at the top of the rock extrusion section is compressive stress, and the axial stress value at the same position is larger than the circumferential stress value; the axial stress and the Mises equivalent stress are distributed in the "W" shape in the pipeline axis, and the circumferential stress is distributed in the "V" shape in the pipeline axis; after removing the rock, the axial stress, the circumferential stress and the Mises equivalent stress all decrease in varying degrees, the reduction curve of the axial stress and the Mises equivalent stress show an "inverted V" shape, while the reduction curve of the circumferential stress shows a "V" shape.