Positioning and clamping device suitable for rail transit swing bolster side frame cutting

The invention relates to the technical field of rail part equipment machining treatment, in particular to a positioning and clamping device suitable for rail transit swing bolster side frame cutting, which comprises a part table used for oppositely arranging at least two groups of clamping assemblies and supporting a to-be-machined swing bolster or side frame; the clamping assembly comprises a support arranged on the part table, a clamping base and a clamping upper base are arranged on the support, the clamping upper base is opened and closed in a lifting mode relative to the clamping base, the clamping upper base is provided with two clamping heads, one clamping head is located in the middle of the clamping upper base, and the other clamping head is located at the end of the clamping upper base. The structure of the clamping device is optimized and improved, the swing bolster and the side frame can be supported in a compatible mode, the clamping device does not need to be replaced frequently, or multiple mac