The invention discloses a simple shape righting tool for an automobile upholstery. The simple shape righting tool comprises a bearing part and a shape righting part, wherein the bearing part has a flat plate structure, the shape righting part is fixed on one surface of the bearing part and protrudes out of the bearing part, the shape righting part has linear or polygonal structure formed by a plate type structure. The invention further provides a usage method of the simple shape righting tool for the automobile upholstery, the usage method comprises the following steps: after being demolded, the automobile upholstery can be put in the simple shape righting tool in a manner that the front side faces outwards, the bearing part is arranged in a window frame of the automobile upholstery, an auxiliary plate is folded to be vertical, the automobile upholstery is clamped in a hook opening to be fixed. In summary, according to the simple shape righting tool, an automobile upholstery plate is always in the shape righting state from starting to loading so as not to be deformed due to high temperature and extrusion, and the percent of pass is up to 98%. Furthermore, the simple shape righting tool is low in cost, and convenient to operate, and can be massively manufactured and recycled.