A safety earphone comprising: an earphone head , provided therein with a sound cavity which has a first end having a sound outlet, a main body , provided therein with a sound collecting cavity with a channel opening wherein the channel opening is connected to a second end of the sound cavity through a sound wave transmission channel , a micro-loudspeaker , wherein the sound collecting cavity is between a sounding end of the micro-loudspeaker and the sound wave transmission channel , wherein the micro-loudspeaker is connected with a first end of a conductor outside the main body and a second end of the conductor is connected with a plug , wherein the sound collecting cavity is of the inversed taper shape, wherein the main body is provided therein with a microphone , the main body has a sound receiver hole corresponding to the microphone , wherein a small sealed box is placed in the main body , defining the sound collecting cavity therein, wherein both ends of the small sealed box are sealingly connected with the periphery of the sounding end of the micro-loudspeakers and the channel opening respectively, such that the sound wave from the micro-loudspeaker is transmitted to the sound cavity through the sound collecting cavity and then through the sound wave transmission channel , characterized in : wherein the microphone is mounted in a round hole in the main body with a sound receiving face of the microphone facing outward and the periphery of the microphone sealed, so that the sound is transmitted to the microphone through a microphone cavity located between the sound receiver hole on the main body and a sound receiving hole in front of the sound receiving face of the microphone . an earphone head , provided therein with a sound cavity which has a first end having a sound outlet, a main body , provided therein with a sound collecting cavity with a channel opening wherein the channel opening is connected to a second end of the sound cavity through a sound wave transmission channel , a micro-loudspeaker , wherein the sound collecting cavity is between a sounding end of the micro-loudspeaker and the sound wave transmission channel , wherein the micro-loudspeaker is connected with a first end of a conductor outside the main body and a second end of the conductor is connected with a plug , wherein the sound collecting cavity is of the inversed taper shape, wherein the main body is provided therein with a microphone , the main body has a sound receiver hole corresponding to the microphone , wherein a small sealed box is placed in the main body , defining the sound collecting cavity therein, wherein both ends of the small sealed box are sealingly connected with the periphery of the sounding end of the micro-loudspeakers and the channel opening respectively, such that the sound wave from the micro-loudspeaker is transmitted to the sound cavity through the sound collecting cavity and then through the sound wave transmission channel , characterized in : wherein the microphone is mounted in a round hole in the main body with a sound receiving face of the microphone facing outward and the periphery of the microphone sealed, so that the sound is transmitted to the microphone through a microphone cavity located between the sound receiver hole on the main body and a sound receiving hole in front of the sound receiving face of the microphone . <EOS>