The invention discloses a clamping mechanism used for an industrial robot, and belongs to the technical field of industrial robots. The clamping mechanism used for the industrial robot comprises a fixed plate, a first clamping plate and a second clamping plate. A first groove, a second groove and a through hole are cut in the inner wall of the first clamping plate, a moving rod is in sliding connection into the inner wall of the through hole, the top of the moving rod is connected with a connecting plate, the outer wall of the connecting plate is connected with a first elastic element, the first elastic element is connected between the connecting plate and the inner wall of the first groove, the inner wall of the first groove is connected with a first wedge block, the outer wall of the first wedge block is in sliding connection with a second wedge block, the outer wall of the second wedge block is connected with a sliding rod, and the end, away from the second wedge block, of the sliding rod is connected with an extrusion plate. A stop rod is arranged on the outer wall of the first clamping plate, after clamping the object, the clamping plate can stop the object, the object fallingcaused when the clamping mechanism clamps the object can be avoided, and the grabbing efficiency of the industrial robot can be improved.