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.