The utility model relates to an earphone especially relates to an insulating transformer earphone. The utility model discloses an adopting the range of sound, conducting region and listening district, adopting the range of sound, conducting region and listening district and loop through threaded connection, adopt the range of sound and be high density insulating plastic for double -deck loudspeaker form, skin, the inlayer is iron, the conducting region is the retractable tubular structure, and the material is high density insulating plastic, the listening district is the double -deck hopper -shaped that leaks, the outer high density insulating plastic that is, and the inlayer is iron, is close to the inside speaker that is equipped with in listening district of conducting region one side. The utility model discloses simple structure, it is with low costs, convenient to carry, easy operation safety, the diagnosis of the quick accuracy of being convenient for make for the transformer trouble.