Automobile chassis assembly mechanical arm

The invention relates to the technical field of assembly mechanical arms, in particular to an automobile chassis assembly mechanical arm which comprises a mechanical arm body, the executing end of the mechanical arm body is rotationally connected with a connecting base, and a calibration mechanism used for conducting position calibration on an anti-collision beam is arranged on the upper surface of the connecting base. The calibration mechanism is provided with a tightening mechanism used for fixedly installing the anti-collision beam, the calibration mechanism comprises two sliding rails which are fixedly connected to the upper surface of the connecting base and are in bilateral symmetry, and through the arrangement of the tightening mechanism, when the anti-collision beam is installed on an automobile chassis frame, the anti-collision beam can be tightened; when the fixing bolts are not tightened, the anti-collision beam can abut against the mounting position all the time, so that it is guaranteed that the