The utility model relates to a voltage transformer automated inspection assembly line chassis layer board mechanism, including the layer board, connect the fixed stop on the layer board, still be connected with the adjustable fender who prevents the mutual-inductor and topple on the layer board, this adjustable fender's angle is rotatable compared with the prior art, the utility model discloses use in carrying on the voltage transformer automated inspection assembly line, confirm the mutual-inductor position of placing through the fixed stop on the layer board to fix the mutual-inductor with adjustable fender, the chassis layer board is furnished with two adjustable fender when fixed single mutual-inductor, the mutual-inductor of placing to chassis layer board has and on the position accurate, the advantage that does not take place the offset and topple in assembly line transportation process