The invention provides a halogen-free insulated wire, which comprises a conductor, an inner layer on the conductor and a coating layer coated on the outside of the inner layer. The insulated wire is characterized in that the coating layer has the following characteristics that: the insulated wire has hydrolysis resistance, the insulated wire is placed in a constant temperature and humidity cabinet at 85 DEG C and 85% RH for 30 days, the stretch elongation of the insulated wire in an elongation test is higher than 200%; flame retardancy, according to IEC60332-1, a combustion test is carried out, within the distance from an upper supporting part to a carbonization part, the distance to the upper part of the insulated wire is longer than 50mm, the distance to the lower part of the insulated wire is narrower than 540mm; heat resistance, according to JISC3005, a heat treatment is carried out, and the streth elongation of the elongation test is higher than 200%; abrasion resistance, a two-pound load is applied, a back and forth movement is carried out at the front end of a abrasiometer till the short circuit of the wire happens, the back and forth number is more than 100 times; smoke emission, according to IEC60695-6-30, a smoke emission concentration test is applied, and the smoke emission concentration is less than 100.