The invention belongs to the technical field of discharging valves of sterile pharmaceutical drying machines and relates to a novel-structure discharging valve arranged on the side face of a drying machine, in particular to a hard-seal side-face discharging valve of a drying machine. The hard-seal side-face discharging valve of the drying machine mainly structurally comprises a tank connecting flange, a sealing base, a sealing clamp ring, hard alloy faces, a discharging port, a transmission shaft, an air blowing port and a valve plug body. The sealing base and the sealing clamp ring are each a single integral component, sealing can be achieved without additionally arranging a sealing ring, the portions, making contact with materials, of the sealing base and the sealing clamp ring are not provided with sealing grooves, and thus material residues and cross contamination caused by the material residues are avoided; the contact surfaces of the sealing base and the sealing clamp ring are both the hard alloy faces, so that the service life of the discharging valve is effectively prolonged, and time for halt maintenance caused by replacement of sealing pieces is greatly shortened for enterprises; and the overall structure of the discharging valve is simple and firm, the design principle is reliable, the service life cycle is long, the manufacturing cost is low, and the application environment is friendly.