Abstract: In order to achieve safe and efficient recovery of super-long fully mechanized caving face in soft and thick coal seam, the paper studies the key technology of 1312 super long fully mechanized caving mining face in the soft thick coal seam of Sanyuan Coal Industry. Through theoretical analysis, downhole field data analysis, the transportation equipment, support strength, mine pressure and coal wall stability of the 362m super-long fully mechanized caving face in the soft thick coal seam of Sanyuan Coal Mine were analyzed. The research shows that the current mining technology and equipment level can fully meet the requirements for support and transportation of super-long fully mechanized caving face in soft and thick coal seams; During the recovery period of the super-long fully mechanized caving face, the top plate activity is more frequent than the working face below 200m, the tendency of the direction cycle is unsynchronized, and the mining pressure is more intense, and the roof management is more difficult; In order to improve the stability of the top surface of the working face and the coal wall, sufficient support strength is ensured;A dual-circuit liquid supply system is required to ensure sufficient initial support of the bracket, and the advancement speed of the working surface should be appropriately accelerated. Grouting reinforcement technology is adopted when the coal wall and roof are broken. The research results have achieved good results in the application of 1312 super long fully mechanized caving face in Sanyuan Coal Industry, and provide reference for the safe mining of similar working conditions around the surrounding area.