An electronic cigarette atomizer capable of preheating an e-liquid, comprising a mouthpiece housing (1); a suction port (10) is provided at the center of one end of the mouthpiece housing (1), and an opening (12) is provided at an opposite end thereof, the suction port (10) is inwardly connected to a vapor discharge pipe (11), an external part of one side of the mouthpiece housing (1) located at the opening (12) is provided with an insertion portion (14) with a reduced outer diameter, the insertion portion (14) is used for being inserted into a connection end of a battery rod; a sealing sleeve (2), a heat conduction pipe (3), an atomization unit (4), an atomization base (5) and a base (6) are sequentially connected to one side of the mouthpiece housing (1) from the vapor discharge pipe (11) towards the opening, the atomization unit (4) comprises a liquid guiding piece (41) and an electric heating wire (42) winding around a middle section of the liquid guiding piece (41), a liquid storage chamber (13) is enclosed by an inner wall of the mouthpiece housing (1), an outer wall of the vapor discharge pipe (11), an outer wall of the heat conduction pipe (3) and an upper end of the atomization base (5), the heat conduction pipe (3) is in direct contact with the e-liquid in the liquid storage chamber (13), and can conduct, to the e-liquid, heat generated when the electric heating wire (42) is heated, so as to preheat the e-liquid and reduce the viscosity thereof. This electronic cigarette atomizer can preheat the e-liquid, and is suitable for atomizing a thick e-liquid, a wax-like e-liquid, etc.
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