Changba Lead-Zinc Mine uses open stope with subsequent filling.In order to implement the stope filling smoothly,it is necessary to analyze and design the filling retaining wall during stope filling.Based on the force analysis of the underground filling retaining wall,it is clear that the force of the retaining wall is closely related to the height of the filling slurry.The optimal height of the initial filling is 1.5 m,and the interval between the two fillings should be more than 24 h.When the filling height exceeds the retaining wall and the filling body accumulates to a certain strength independently at the initial setting,continuous filling can be carried out.Through the comparison of the advantages and disadvantages of similar mine retaining wall,the reinforced concrete retaining wall is determined to seal the bottom structure and stratification of open stope with subsequent filling，and wooden retaining wall to block patio connection;based on the retaining wall thickness calculation methods of compressive strength,shear strength and permeability resistance,the thickness of reinforced concrete retaining wall is determined to be 0.5 m.The concrete structure of the retaining wall is designed,realizing the construction of an underground stope filling retaining wall.The production practice proves that the design scheme of the retaining wall is safe and reasonable,and the field application results are good.