Abstract: To increase the top-coal recovery ratio in the condition of horizontal subsection top-coal caving in steeply inclined coal seam, based on BBR system and taking 1203 east wing working face of a coal mine as the engineering background, similar simulation and theoretical analysis are used to optimize the interval drawing mode. The similar simulation result indicates that when we adopted large interval drawing, the drawing funnel is formed by filling gangue from the gob of upper level which creates a favorable condition for top-coal drawing. Besides, the distribution of drawing volumes in different positions is in jagged shape, and the peak of the jag shows the full development of the drawing body. Compared with the drawing in order model and the interval drawing model, the top-coal recovery ratio of the model with large interval drawing is increased by 5.91% and 3.17% respectively. At last, the optimal drawing method of 1203 east wing working face is obtained by calculating the reasonable drawing interval, which improves the top-coal recovery ratio.