Abstract: Non-pillar sublevel caving method is one of the main mining methods for many metal mines in China,which is safe,efficient and has low production cost.The medium-deep hole blasting method used in this method,the uneven crushing of ore and rock and the process of ore drawing will produce a large amount of powder ore.The powder ore in the ore rock bulk is easily affected by water,which will produce cohesive force and affect the ore drawing effect.In order to analyze the influence of water content and fine ore content in ore rock on the ore drawing effect of pillarless sublevel caving method,the physical simi larity test method was used for research.The results show that:① The water content has a great influence on the ore recovery rate,the amount of ore rock and the dilution rate,while the powder content has little effect on the ore recovery rate and the a mount of ore rock,and has a great influence on the dilution rate.Through the comparative analysis of effect quantity index,the influence of water content on ore drawing effect is generally greater than that of powder content.② The interaction between wa ter content and powder content has a significant effect on the ore drawing effect.When the water content is 0% and the powder content is 11%,the ore recovery rate is the highest.When the water content is 9% and the powder content is 13%,the dilution rate is the highest.When the water content is 15% and the powder content is 17%,the amount of ore rock is the most.Through the analysis of slope change and color gradient degree of smooth surface,the influence degree of powder content is less than that of water content,which is consistent with the conclusion in variance analysis.③ The waste rock funnel decreases first and then increases with the increase of water content.