Drying and mixing device for producing potash magnesium sulphate fertilizer

The invention discloses a drying and mixing device for production of potash magnesium sulphate fertilizer, the drying and mixing device comprises a mixing barrel and a drying box, an auxiliary assembly is arranged in the drying box, the auxiliary assembly comprises a moving plate arranged at one end of the drying box, a plurality of sliding grooves are formed in the moving plate, and a partition plate is slidably clamped in each sliding groove; a pair of limiting grooves is formed in the bottom end of the drying box, a sliding block is slidably clamped in each limiting groove, one end of each sliding block is connected with a sliding shaft, the sliding shafts are connected with sleeve shafts, the two sleeve shafts are connected through a bidirectional hydraulic rod, and the bidirectional hydraulic rods are fixedly arranged on the outer side of the drying box. The auxiliary assembly can be matched with the drying box to conduct layered drying on the potash magnesium sulphate fertilizer finished products so as