High-efficiency roller mixer for producing seedling substrate

The utility model belongs to the technical field of seedling substrate production, and particularly relates to an efficient roller mixer for producing seedling substrates, which comprises a fixed frame, a mixing drum is rotatably connected to the inner side of the fixed frame, a plurality of outer ring components are arranged on the outer side of the mixing drum, and each outer ring component comprises a sealing ring, a connecting box, a nozzle and a drainage tube. The plurality of sealing rings are arranged on the outer wall of the mixing cylinder in a sleeving manner, and liquid injection holes corresponding to the nozzles are formed in the mixing cylinder; the plurality of sealing rings can be distributed in a plurality of area positions of the mixing cylinder, when the mixing cylinder is used for mixing seedling culture substrates, culture liquid is introduced into the nozzles through the drainage pipes, the culture liquid is sprayed out of the nozzles and is introduced into the mixing cylinder through th