The utility model relates to a device for preparation of sheet metal metallographic specimen, including anchor clamps, base, limiting plate, fly leaf, base and limiting plate fixed connection set up anchor clamps between fly leaf and the limiting plate, and the anchor clamps internal fixation has a sheet metal metallographic specimen, limiting plate and fly leaf on all be equipped with with anchor clamps assorted recess. The utility model has the advantages that: overall structure is simple, easily preparation, and it is fixed that the sheet metal metallographic specimen passes through anchor clamps, and cooperation base, limiting plate, fly leaf are spacing, fix at milling machine, flat grinder upward with the aid of machine flat -nose pliers to conveniently mill, process such as mill, realized the machine processing of sheet metal metallographic specimen having improved work efficiency, convenient operation has reduced intensity of labour.