Abstract: Aiming at the problems of high gangue content and low recovery rate of the whole fully mechanized caving mining in soft surrounding rock and extra-thick coal seam, the paper put forward the "top layer and large mining height fully mechanized mining frame after high-efficiency netting + lower slicing whole layer fully mechanized caving" mining Method,determined the netting, hanging, spreading, and networking processes for efficient netting after the top-slice large-cutting height fully-mechanized mining frame,developed an efficient net-laying material transportation system and an automatic net-spreading system after the working face frame, and determined the efficient netting method after the rack.The ground test of the efficient netting system was carried out to test the compression effect of the flexible net, the efficiency of the netting transportation system, the effectiveness of the netting process and the speed of networking.The test results show that the pulling speed of the high-efficiency netting and transportation system behind the large mining height fully-mechanized mining frame is 43.1m/min~49.1m/min, and the networking speed is 1.33m/min.The flexible net roll at the rear of the support can be spread smoothly without any distortion or shrinkage of the net roll. The net roll is effective and feasible; The overall process operation time of the net laying is 87.5 minutes, and the annual production capacity of the working face can reach more than 6 million tons.It can realize the high productivity and efficiency of the working face.The test results have important reference significance for the high-efficiency and high-recovery mining of soft surrounding rock and extra-thick coal seams.