The invention discloses an accelerating tube device and an
electron accelerator, the accelerating tube device comprises an accelerating tube standard module, an insulating column, an
electricity leading conductor and an
electrode plate, the accelerating tube standard module comprises a
ceramic tube, the inner surface of the
ceramic tube is provided with a plurality of guide grooves, the shape of the insulating column is matched with that of the guide grooves, and the
ceramic tube is provided with a plurality of
electricity leading holes; the
electrode plate comprises an
electrode plate main body, the outer edge of the electrode plate main body is provided with a guide bulge, and the shape of the guide bulge is matched with that of the guide groove; the guide protrusions and the insulation columns are alternately arranged in the guide grooves in an overlapped mode, and each electrode slice is horizontally aligned with one
electricity leading hole. The electricity leading conductor is electrically connected with the electrode slice through the electricity leading hole, and the electricity leading conductor and the electricity leading hole are sealed. The accelerating tube device is stable in structure, low in
rejection rate, easy to install and operate and easy to produce, and the number of the accelerating tube modules can be adjusted to adapt to accelerating tubes with different
voltage values.