Efficient heat dissipation device for notebook computer

The utility model provides an efficient heat dissipation device for a notebook computer, which comprises a left supporting plate, a heat dissipation fan is arranged at the top of the left supporting plate, a sliding chute is arranged in the left supporting plate, a sliding rod is connected in the sliding chute in a sliding manner, and a right supporting plate is fixedly connected to the right side of the sliding rod. According to the efficient heat dissipation device for the notebook computer, a first rotary knob is pulled outwards, at the moment, a driving gear is in engaged connection with a rack, the first rotary knob is rotated, at the moment, the distance between a right supporting plate and a left supporting plate is changed, and the distance between two heat dissipation fans is further changed; therefore, the effects of conveniently adjusting the position of the cooling fan and improving the cooling efficiency are achieved. A second knob is rotated, at the moment, a sliding block moves left and right o