Mechanical gripper and robot

The utility model discloses a mechanical gripper and a robot. The mechanical gripper comprises a body, a first driving piece, a driven piece, a first lead screw and a second lead screw. The body comprises a first end and a second end which deviate from each other in a first direction; the first driving piece is fixedly arranged at the central position between the first end and the second end; the driven part is arranged between the first end and the second end and is in transmission connection with the first driving part; one end of the first lead screw is connected with the first end, one end of the second lead screw is connected with the second end, and the end, deviating from the first end, of the first lead screw and/or the end, deviating from the second end, of the second lead screw are/is in transmission connection with the driven part. The problem that in the metal profile grabbing process, the gravity center is not stable, and consequently the profile falls is solved.