The "Micro Cooling Fan" includes guards, blades; and the fan safety protection device comprises a proximity sensor, speed sensor, a processing module and driver module, the proximity sensor is fixed to the web cast and to sense whether there exists the danger range of the human body; the speed sensor is fixed to the blades and to sense "Micro Cooling Fan" fan speed; processing module is connected to the proximity sensor and speed sensor, and the processing module in accordance with recent issued from the sensing result of the sensor and speed sensor sensing results of a control signal; a processing module connected to the drive module and the drive module according to the deceleration control signal blades. The present invention is "Micro Cooling Fan" safety devices by drive module controls the fan deceleration in dangerous situations, may accelerate blades deceleration to avoid the occurrence of accidental injury.