Pick-and-place mechanism and processing system

The utility model discloses a pick-and-place mechanism which comprises a mechanical arm, a wheel disc and a plurality of pick-and-place assemblies, the mechanical arm comprises a first driving part used for outputting rotation drive, the wheel disc is connected to the output end of the first driving part so as to be driven by the first driving part to rotate, and the pick-and-place assemblies are arranged on the periphery of the wheel disc. The taking and placing assembly is used for picking up and placing down materials and comprises a second driving part, a first connecting base, a second connecting base and abutting parts, the second driving part is connected to the wheel disc, the first connecting base and the second connecting base are correspondingly arranged on the two sides of the second driving part, and the abutting parts are divided into two equal groups; the two sets of abutting pieces are used for abutting against the materials when the first connecting base and the second connecting base get clo