The present application discloses an atomizing assembly and electronic cigarette. The atomizing assembly comprises a connecting assembly, an atomizing core, an oil cup assembly and a sealing gasket. The connecting assembly comprises a connecting base and a lower electrode. The oil cup assembly comprises an oil storage sleeve, a vent pipe, and a mounting sleeve which enclose to form an oil storage chamber for storing smoke oil. The connecting base and the oil storage sleeve are either abutted against or expandedly fitted with each other. The connecting base is cappingly provided on an oil filler of the oil storage sleeve. The atomizing core comprises an atomizing sleeve, a heating wire assembly, a smoke oil retention member and an inner electrode. The inner electrode is abutted against and electrically connected to the lower electrode. The atomizing core is slidably sleeved in the mounting sleeve.
