In the process of filling goafs,the sealing function of filling retaining wall is very important,and the rationality of its design and construction directly affects the safety and efficiency of filling operation.Based on the compression simulation test of the filling retaining wall,the stress imposed on the retaining wall in the filling process is predicted.Based on the theoretical calculation,the reasonable thickness and structural parameters of the retaining wall are designed.The underground engineering tests are carried out,and good results are obtained.The design can provide reference for safe and economical design for retaining wall in other filling mines.