According to 51101 mechanized mining face retracement channel support problem in Shengxin mine, retracement channel rock face through deformation and failure characteristics were analyzed, its supporting elements were expounded, combined with the on-site production of actual geological conditions, the thesis proposed retracement of the channel anchor net combined support programs. Field observations showed that the rock pressure, primary and secondary roof retracement channel volume at maximum subsidence of about 390 mm, the maximum amount of subsidence retracement channel appeared in the middle of 517 mm, the retracement channel surrounding rock deformation and failure were under effective control.