The utility model discloses a metal plate belt solution hardening processing apparatus, include: the base has force bearing rod's a cuboid frame, adopts the welding mode to be connected between forcebearing rod and the cuboid frame base, and the welding mode that adopts all around of cuboid frame base is connected, and four corners position adoption welding mode is connected at the bottom of thestabilizer blade of base and the frame, the equal trompil of incline board and movable supporting plate, through fastening bolt connection, last the opening of movable supporting plate has the wedge type mouth, and the accessible spacer pin is fixed, and the spacer pin both sides are equipped with the trompil, and available fastening bolt fixes the spacer pin on movable supporting plate. Connect the fixed movable supporting plate's of different positions and spacer pin of incline board different positions through movable supporting plate, can carry out rolling face or cross -section to the slab band of different thickness and go into quenching treatment earlier. This device simple structure is applicable to the solution hardening thermal treatment that laboratory dimension board took the sample.