The present invention discloses an automatic tracking sound source classroom sound amplification system, comprising a vacuum adsorption mobile system, a sound positioning navigation system, and a sound source amplification system. Wherein an audio receiving device 4 in the sound positioning navigation system monitors a sound source in a classroom in real time, performs real-time monitoring and analysis on audio signals through a processing circuit 5, and transmits analyzed results to a radio receiving device 3 of the vacuum adsorption system through a radio transmitting device 6; the vacuum adsorption system is always adsorbed on a ceiling, and receives algorithm processing results transmitted by the sound positioning navigation system, and drives the entire system to quickly reach a soundsource position through the mobile device; the sound source amplification system reads sound source audio information through a microphone 7, performs power amplifier processing through a power amplifier board 9 and plays out to the entire classroom through a speaker 8. The system is an indoor sound amplification device capable of being adsorbed on the ceiling, automatically tracking the sound source and automatically moving towards the sound source to finally realize wireless automatic indoor sound amplification.