Abstract: Disclosed is a ball valve, including a drive mechanism, a transmission mechanism, a valve body assembly and a valve core component. The transmission mechanism is configured to drive the valve core component to act through the drive mechanism. The valve body assembly includes a first valve body component and a second valve body component. The first valve body component is fixedly connected to the second valve body component. The valve body assembly is formed with a containing cavity. The transmission mechanism includes a first gear ring, and at least part of the valve core component is fixedly connected to or in position-limiting fit with the first gear ring. The valve core component includes a platform part and a plane part. The platform part is located at or adjacent to a rotating center of the valve core component.