Electric pipe threading machines are divided into desktop and portable. The desktop threading machine is composed of an aluminum alloy body, a motor, a reduction box, a pipe chuck, a die head, a cutting rack, a knife feeding device, and a cooling system. It is durable and suitable for mass processing pipe threads in mobile or fixed places. The electric pipe threader is light in weight, can quickly replace the die head, is labor-saving, fast and convenient to carry; it is not restricted by the site, and can be flexibly operated on the construction site or in unconventional occasions.