The invention discloses sintered flux for efficient submerged arc welding and a production technology of the sintered flux. The sintered flux comprises front face flux and reverse face flux, the front face flux is composed of Al2O3, CaO, CaF2, MgO, SiO2, TiO2, B2O3, Fe powder and silicon calcium alloy, and the reverse face flux is composed of Al2O3, CaF2, MgO, MnO, SiO2, TiO2, Fe2O3 and silicon calcium alloy. The technology comprises the steps that batching is performed on raw materials according to ingredients of the sintered flux, the raw materials are put into a blender for even blending, a mixed material is obtained, bonding agents are added in the mixed material for granulation, low-temperature drying is performed at the temperature of 200 DEG C to 300 DEG C, after screening, sintering is performed, screening is performed again, and the product sintered flux is obtained. The sintered flux can meet the technological requirement of the good single face for being welded into double faces, the reverse face welding way is stably formed, and the sintered flux is suitable for high-speed welding, has the good mechanical performance and meets the 3Y standard required by classification societies of various countries.