The invention discloses a clamping assembly for a milling machine, comprising a fixed frame, a long hole, a fixed seat, a fixed plate, a chute, a movable plate, a spring, a screw hole, an adjustment screw and a groove, and the upper end of the fixed frame is provided with a fixed seat, the two sides of the fixed frame are provided with long holes, the two ends of the fixed seat are symmetrically provided with fixed plates, a chute is provided between the two fixed plates, and two symmetrically arranged The movable plate is provided with a spring between the fixed plate and the movable plate arranged on the same side, and the fixed plate is provided with a screw hole, and an adjusting screw is arranged in the screw hole, and the adjusting screw passes through the screw hole to contact the For the movable plate, a groove is provided at the contact between the adjustment screw and the movable plate, and the adjustment screw extends into the groove. The invention has the advantages of simple structure, convenient use, good clamping effect, convenient adjustment and high processing precision.