The invention provides an automatic maintenance type electric soldering iron. The automatic maintenance type electric soldering iron comprises a soldering iron head, a handle and a power supply. The automatic maintenance type electric soldering iron is characterized in that a tin supply box is arranged on the handle; tin wires are wound in the tin supply box; the tin supply box is connected with one end of a tin conveying pipe; the other end of the tin conveying pipe is close to the tail end of the solder iron head; and a tin supply switch controls the tin supply box to add tin to the soldering iron head.