The invention provides a method and device for connecting a cover and a body of a conveyer, and belongs to the field of transmission of gas and power. According to existing conveyers, the end face, exposed out of a barrel, of a covered conveyer is prone to being impacted to be clamped in a pipeline, or a cover and a barrel are separated when the conveyer barrel is opened, and operation is not convenient. Use is affected by the reasons, and the problems are solved by the method and device. The conveyer cover and the central district of the conveyer body are connected, and movement, in the direction of the axis of a pivoting device, of the cover is limited; after the cover is opened, the cover is connected with the central district of the conveyer body, and after the cover is closed, the cover falls into the conveyer body.