The invention discloses a clamp of a detection device for anode current distribution of an aluminium electrolysis cell. The clamp comprises a U-shaped buckle girder, the U-shaped buckle girder comprises a girder body, a first side plate and a second side plate, the first side plate and the second side plate are located at the two sides of the girder body, and the middle of the girder body is provided with a U-shaped buckle; the U-shaped buckle comprises a supporting arm welded to the girder body and a semi-circular arc buckle plate welded to the outer end of the supporting arm, and a cylindrical insulation shaft sleeve is arranged in the semi-circular arc buckle plate and used for installation of a stepping motor. In order to provide a fixing position for the current detection device on ananode bus of the aluminium electrolysis cell, the clamp is structurally divided into two parts, one part is a bus fixing end, and the clamp is fixed to the anode bus through a fastening screw; the other part is a motor fixing end, and by means of the motor fixing end, a motor of the current detection device is fixed to the clamp.