The CCD type series electric ultra-high vacuum gate valve uses a screw to electrically push the sealing shaft (rod) to perform axial movement, push (pull) the lifting mechanism, and drive the driving body to move along the axial direction. When the positioning plate moves to the stop block, the sealing pressure plate and support plate stop axial movement, and the steel ball lying inside the sealing pressure plate and support plate ball socket is pushed out of the ball socket by the driving body, causing the support plate and sealing pressure plate to deviate from the driving body, When the steel ball completely leaves the ball socket and is located on the plane of the support plate and sealing pressure plate, the compression force reaches its maximum, and the valve is completely closed. When the driving body is pulled backwards, due to the high friction force between the sealing pressure plate and the support plate and the flange surface, the steel ball is pulled back to the ball socket by the driving body, and the sealing pressure plate and support plate, under the action of the central spring, press against the driving body, Follow the drive body - move backwards and away from the flange orifice, allowing the valve to fully open. The suitable working medium is clean air and non corrosive gases.