Electrical polyester non-woven cloth is made from polyester fiber, with high heat resistance and excellent impregnating and dielectric properties, which is widely used for base materials of flexible laminated composite such as dmd , dmd100 and prepreg dmd, it also can be as the reinforcement material of mica tape, base layer of insulation varnished cloth and and also be used for wrapping motor coil and magnet wire and cable.