The support of the surrounding rock of the main equipment remove gateway is an important problem that must be solved in the large mining face with the multi channel moving technology of the auxiliary alley. It's quality directly affects the removal efficiency of the working face and the safe production of the coal mine. In order to further optimize the retracting channel support scheme and improve the quality of support. Take Shendong Daliuta coal mine 52501 main equipment remove gateway as an example. Using the FLAC3D numerical simulation method. Research on the existing retracting channel support scheme. The research results are expected to be applied to the next main equipment remove gateway in the next working face. The results of the study show that, after the optimization, the deformation of the positive buttock and negative buttock of the tunnel is 302mm and 73mm. An increase of 5.9% and 7.3% compared with the existing schemes. The deformation of the roof is 236mm. More than 4.8% of the existing schemes have been increased. The support parameters of the optimized scheme can keep the main retracting channel stable.