The utility model discloses a preformed cup sealing and blanking apparatus after finishing loading. A cylinder is connected with a frame, and the frame is connected with a press cover block with a heat sealing body, a pressed film plate and a cutter, and the relations of the mounting positions of the press cover block, the pressed film plate and the cutter are respectively that, the position of the pressed film plate is lowest, the positioned of the press cover block is lower, and the position of the cutter is highest. The frame is connected with the pressed film plate and the press cover block by a guide bar connected on the cross bar of the frame, and the guide bar is provided with a pressing spring arranged between the lower part of the transverse web frame of the guide bar and the spring base of the guide bar or the pressed film plate, and the spring base or the pressed film plate is fixedly connected with the guide bar, and the guide bar fixedly connected with the pressed film plate is connected with the lower cross bar of the frame. The press cover block is connected with the guide bar by the heat sealing body, and the guide bar is connected with the upper cross bar by the lower cross bar of the frame, and then the guide bar is matched with a guide sleeve. The utility model has the advantages of simple and reasonable structure, stable performance and convenient repair etc.