Efficient heat dissipation structure of mobile phone mainboard

The utility model provides an efficient heat dissipation structure of a mobile phone mainboard. The mobile phone comprises a mobile phone mainboard, a mobile phone shell, a processor, a storage battery and a micro fan, the mobile phone mainboard is installed in the mobile phone shell. The processor, the storage battery and the miniature fan are installed on the mobile phone mainboard. Wherein theprocessor is electrically connected with the storage battery, the micro fan is connected with the output end of the processor, a loudspeaker is arranged at the top of the mobile phone mainboard, a microphone is arranged at the bottom of the mobile phone mainboard, a sound outlet is formed in the mobile phone shell corresponding to the loudspeaker, a sound inlet is formed in the mobile phone shellcorresponding to the microphone, and a detachable dustproof device is arranged in the sound inlet. The heat dissipation structure can accelerate air flow in the mobile phone shell, form air convectioninside and outside the mob