Disclosed is a dual-purpose combined iron, in particular an electrical iron in which a steam brush group (30) can be detached from a metal soleplate base. The dual-purpose combined iron comprises a steam brush group, a base group (40) and a temperature regulation knob wh i ch is composed of an outs i de knob (10) rotatablely arranged on a steam brush group shell and an inside knob (20) rotatablely arranged on a base group shell. The inside knob is connected to a gear regulation rod (46) of a temperature regulator of the base group shell. The outs i de knob and the inside knob are inserted to connect to each other by conjugation of the pillar surfaces of a shape of regular polygon or regular polygonal star. The iron enables the temperature regulation knob arranged on the steam brush group and the gear regulation rod of the temperature regulator of the base group to realize detachable connection.