The utility model belongs to electric soldering iron in the electric appliance maintenance industry, and particularly relates to tin dripping type electric soldering iron. The tin dripping type electric soldering iron comprises a welding nozzle, an outer sleeve, a piston, a heating tube, an insulation push rod, a pin, a conducting wire, a handle, a set screw, a push rod, a conducting wire joint, a reset spring, a rear cover and a button. During welding, a solder wire penetrates into a wire feeding hole, the button is pressed down, an annular cutting edge of the piston and a cutting edge of the outer sleeve act jointly to cut off the solder wire and seal the solder wire in a tin melting cavity between the welding nozzle and the piston, the button is pressed down continuously, and a solder fluid is pushed out through a tin outlet hole in the front end of the welding nozzle. The piston can form pressure difference in the tin melting cavity during reset under the action of the reset spring, and solder can be recovered, that is, the electric soldering iron has functions of the electric soldering iron and a solder sucker. The electric soldering iron can solve the problem that rosin in the solder wire volatilizes easily in the tin dripping type electric soldering iron and can further solve the problems of small contact area of the solder wire and a welding head, low temperature increase, proneness to insufficient solder and desoldering, difficulty in control of flow direction and flow rate of solder as well as requirement for both-hand operation of a common electric soldering iron.