The invention discloses a semiautomatic electric soldering iron, belongs to the field of welding, and particularly relates to an efficient handy tool for electronic component manufacture and electric appliance maintenance. The semiautomatic electric soldering iron mainly comprises an iron head (1), a heater (namely a resistance wire) (2), a soldering tin melting cavity (3), an insulation housing (4), a rubberized handle (5), a button (8), a tail cap (9), an anti-backflow port (10), a spring (11), a hoop (12), a two-piece elastic through hole (13) and the like. Before the semiautomatic electric soldering iron is used for trickle welding, the resistance wire (2) is electrified, the soldering tin in the soldering tin melting cavity (3) melts into liquid in the cavity, the top button (8) of the iron is pushed, the whole melting cavity (3) moves forward, and drips of the soldering tin are pushed for trickle welding, through the two-piece through hole clamped by the hoop, in the process of opening, closing and pressurizing in the iron head (1). After external force is removed, under the action of the spring, the cavity returns and a switch is closed.