The invention discloses a radiator dust clearing device for a notebook computer. The radiator dust clearing device comprises a working box, a control panel, a switch button, and a battery, the controlpanel is arranged on the front part of the working box, the switch button is arranged on the control panel, the battery is installed in the working box, an air pump is arranged above the battery, a transmission box is installed on the upper part of the working box, a motor is installed on the side face of the transmission box, a first gear is installed on the motor, an air spraying plate is arranged on the side, away from the motor, of the transmission box, a supporting plate is arranged on the side, away from the transmission box, of the air spraying plate, a buckle seat is arranged on the supporting plate, an elastic rope is arranged on the upper part of the transmission box, and a gripping head is arranged on the elastic rope. According to the radiator dust clearing device for the notebook computer, the structure is simple, design is reasonable, operation is convenient, the dust clearing problem of the radiator is well solved, clearing is fast, and the effect is also very good.