A turnover apparatus is configured for flipping a workpiece. The turnover apparatus includes an rotatable frame, a cam assembly, two racks located at the two opposite sides of the cam assembly, a first clamping module and a second clamping module located at the two opposite sides of the workpiece. The rotatable frame includes a power input shaft. The cam assembly is coiled around the power input shaft, and includes an eccentric cam. Each clamping module includes a plurality of transmission assemblies and clamping assemblies. The rotatable frame can rotate around the cam assembly. At the same time, the clamping assemblies can clamp or loosen the workpiece by the driving force of the racks and the transmission assemblies.