The utility model discloses a controlling means of thermal stress among powder bed formula electron beam vibration material disk, including the transparent glass window who lies in that real empty room goes up and set up along the camera shooting orientation, the camera sees through glass window to the inside captured images of real empty room, and the image of taking contain the powder bed with and temperature distribution information, one side of glass window is equipped with sealed passes real empty room and rotatable pivot, and the pivot rigid coupling has a baffle that is located real empty room, and the baffle is switched between the position of sheltering from glass window and the position of staggering glass window by the pivot drive. The utility model discloses a camera sees through glass window to the inside captured images of real empty room, and the image of taking contain the powder bed with and temperature distribution information, the control of realization that can be better thermal stress in to vibration material disk, through setting up the baffle, can keep glass window's transparency effectively, reduced glass window's change frequency.