The invention discloses an electromagnetic induction medium-frequency furnace and a high-strength prestress steel strand production process, and relates to the technical field of steel strand production. The electromagnetic induction medium-frequency furnace comprises a furnace box, wherein an inlet is formed in one side end of the furnace box, a surface cleaning device is arranged on the side wall, close to the inlet, of the furnace box, the surface cleaning device comprises a horizontal sliding rail arranged on the furnace box, a sliding block is arranged on the horizontal sliding rail, thesliding block is connected with a vertical mounting plate, the upper end and the lower end of the vertical mounting plate are detachably connected with a horizontal mounting plate A and a horizontal mounting plate B which are located on the upper side and the lower side of the inlet respectively, and the side, close to the inlet, of the horizontal installation plate A and the side, close to the inlet, of the horizontal installation plate B are respectively provided with a wiping layer. According to the high-strength prestress steel strand production process, chlorohydric acid pickling, water washing, phosphorization and saponification are sequentially carried out, corresponding steel wires are and drawn out through a wire drawing machine, stranding of the steel wires are performed througha stranding machine, the steel strand is treated by adopting the electromagnetic induction medium-frequency furnace, and finally water cooling treatment is carried out. The steel strand prepared by the production process has the advantages that the strength is high, and the tensile strength can reach more than 2200 MPa.