Clamping device and transfer robot

The invention provides a clamping device and a transfer robot, and relates to the field of construction machinery. The clamping device comprises a bracket, a bearing clamping arm, a first clamping assembly, a second clamping assembly and a clamping plate; the bearing clamping arm is mounted on the bracket and used for bearing a workpiece; the first clamping assembly and the second clamping assembly are both installed on the bracket and both arranged above the bearing clamping arm, and the workpiece can be clamped at a clamping station between the first clamping assembly and the second clampingassembly, wherein the first clamping assembly comprises a width adjusting assembly mounted on the bracket; and the clamping plate is mounted at the output end of the width adjusting assembly, and thewidth adjusting assembly can drive the clamping plate to move in the direction away from or close to the second clamping assembly so as to adjust the width of the clamping station between the first clamping assembly and the s