Holding robot arm of surgical robot

The invention relates to the technical field of medical equipment, in particular to a holding mechanical arm of a surgical robot, which comprises a guide rail clamping device, a mechanical arm and a control device, one end of the supporting device is connected with the guide rail clamping device; one end of the big arm device is rotatably connected with the other end of the supporting device; one end of the lifting arm device is rotatably connected with the other end of the large arm device, and the other end of the lifting arm device can do lifting motion relative to one end of the lifting arm device; the angle adjusting device is arranged at the other end of the lifting arm device, the angle adjusting device can rotate around the rotation center of the angle adjusting device, the vascular interventional operation is carried out through the robotic arm technology, manual operation of a doctor is replaced to achieve the vascular interventional operation, and accurate positioning and flexible planning of the r