Tieshanlong Tungsten Industry Huangsha mining area have the problems of low mechanization level, large quantity of mining preparation and cutting engineering, high labor intensity and large dilution loss rate for original mining technology. In order to solve these problems and improve the mechanization degree and ore utilization rate, according to the development experience of medium-diameter long holes in similar mines, combined with the grooving process of medium-long holes, the coordinated and efficient caving of upward medium-long hole and downward medium-diameter long hole was realized. The medium diameter long hole stage subsequent caving method was developed to mine steeply inclined thin ore body, and representative test blocks were selected for industrial tests. The industrial test results show that compared with the sublevel drilling stage caving method, the medium-diameter long hole stage subsequent caving method reduces the explosive unit consumption by 36.5%, and reduces the loss rate and dilution rate by 60% and 16.8%, respectively. The year-on-year ore volume and WO₃ metal extraction volume increase by 16.7% and 19.0% respectively, and the net profit increases by 729 500 yuan. The results can confirm the significant economic and social benefits of the mining technology of steeply inclined thin ore body, and provide a feasible scheme for long hole blasting mining of steeply inclined thin ore body.