Combined plate positioning tool

The invention belongs to the field of combined plate production, and discloses a combined plate positioning tool which comprises a tool platform (1) used for bearing a main plate (19) and a plurality of rib plates (20) in a combined plate; the main board positioning assembly is arranged on the tool platform (1) and is used for positioning the main board (19); the rib plate positioning assembly is arranged on the tool platform (1) and used for sequentially arranging and positioning the multiple rib plates (20) on the main plate (19) in parallel at intervals. The tool can be used for positioning combined plates with a main plate and a plurality of rib plates such as a background base of a mixer truck, manual line drawing and other operations are not needed in the process, the influence of subjective measurement errors can be avoided, and meanwhile the labor intensity of workers can be reduced. In addition, the positioning precision consistency is high, and a basis is provided for flexible and automatic producti