The invention discloses a multi-claw smoke exhaust ventilator capable of achieving automatic adjustment. A motor wind rotor in an oil smoke exhaust tube is connected with a power supply plate through a control switch, and the motor wind rotor enables an air duct and an air outlet to communicate with each other and provides air suction power; the free end of the oil smoke exhaust tube extends in the axial direction and is provided with a multi-claw suction tube in a scattered mode, each claw suction tube is arranged to be of a tubular structure with a convex edge and a circular cross section, and a multi-claw movable mechanism, an extractable oil filtering structure and an automatic adjusting device are arranged in the multi-claw suction tube; an oil smoke sensor is arranged on each claw tip of the multi-claw suction tube, the oil smoke sensors transmit measured signals to a multi-claw transmission controller, and when the measured signals exceed a multi-claw transmission set signal, a multi-claw transmission motor is started to drive a multi-claw suction tube transmission mechanism to achieve automatic adjustment of an oil smoke suction port to the position high in oil smoke concentration through the multi-claw movable mechanism. According to the multi-claw smoke exhaust ventilator, automatic adjustment of the position of the oil smoke suction port is achieved, the suction effect reaches 99%, the power is reduced, electric energy is saved, and oil stains can be conveniently and thoroughly removed.