The invention discloses a concrete member prefabrication component. The concrete member prefabrication component comprises a plate frame, a fixed die plate, a movable die plate, a follower bolt, a spring, a check bolt, a prefabrication platform and a sealing strip, wherein the fixed die plate is fixed on the plate frame; the fixed die plate directly faces the movable die plate; a gap which is used for clamping die plates is arranged between the fixed die plate and the movable die plate; the follower bolt is in threaded connection with the plate frame; the end part of the follower bolt contacts with the outer side of the movable die plate; the check bolt is in threaded connection with the plate frame and the axis of the check bolt is parallel to the axis of a compression bolt; the spring is arranged between the movable die plate and the check bolt; and in working state, two ends of the spring respectively suffer from the pressure stresses of the movable die plate and the check bolt so as to be in an elastic compression state. The invention provides a whole set of device for prefabricating concrete members, so that the technical effect of decreasing the slurry leakage amount or avoiding the slurry leakage in the solidification process of prefabricated members can be achieved.