To investigate the influence of the brow line damage scale on the ore drawing effect, based on the random medium ore drawing theory, a single-segment end ore drawing model was established using the physical similarity test method. The ore drawing test under the brow line damage was carried out from the two scales of the brow line damage width and height. The development law of the draw-out body under different test parameters was determined by the hole-reach method, and the ore drawing loss and dilution index was calculated. The results show that under the same cut-off grade drawing conditions, with the increase of the brow line damage width, the profile width of the drawn body in the direction of the mining approach increases significantly, while the profile width of the drawn body in the direction perpendicular of the mining approach does not change significantly. For every 0.5 m increase in the brow line damage width, the proportion of front waste rock increases by an average of 1.2 percentage points, the proportion of top waste rock decreases by an average of 0.5 percentage points, and the ore recovery rate decreases by an average of 0.6 percentage points. When the brow line damage height increases, the development direction of the drawn body is mainly in the vertical direction, and the shape of the drawn body is more slender. For every 0.5 m increase in the brow line damage height, the proportion of front waste rock decreases by an average of 0.2 percentage points, the proportion of top waste rock increases by an average of 3.9 percentage points, and the ore recovery rate decreases by an average of 5.0 percentage points. The influence of the brow line damage height on the ore drawing effect is significantly higher than that of the brow line damage width. Therefore, in engineering practice, priority should be given to taking measures to avoid and reduce the damage of brow line in the height direction.