Control panel for horizontal reactor, method and reactor

The invention discloses a horizontal reactor control panel, a control panel group of the horizontal reactor control panel comprises a plurality of control panel sheets and a driving mechanism, and adjacent control panel sheets are limited by a limiting mechanism, so that at least an overlapping area with a set width is formed at the top edge of the rear control panel sheet and the bottom edge of the front control panel sheet; the forefront control plate piece serves as a fixed stage to be connected to the reactor core structure, the rearmost control plate piece serves as a driving stage to be connected with a driving mechanism, and the driving stage is pulled by the driving mechanism to enable all the control plate pieces to be overlapped with one another, or all the control plate pieces are unfolded under the action of gravity to cover the radial section of the reactor core. The control panel for the horizontal reactor is simple in structure and flexible, simple and convenient to arrange, the volume increase