The invention discloses an electronic cigarette with an ultrasonic atomization function and tobacco liquid. An ultrasonic liquid atomization mode is set, and compared with general liquid heating atomization, the atomization rate of ultrasonic atomization is improved. Especially, the tobacco liquid is automatically sucked out of a tobacco liquid storage bin through a liquid level adjuster to be atomized by an ultrasonic atomizer, and compared with a current fiber absorption mode and the like, liquid waste is avoided, and meanwhile it can be guaranteed that airflow is sufficient after atomization. Meanwhile, due to the fact that the tobacco liquid directly enters the ultrasonic atomizer, the atomization rate can be further improved, atomization components can be even relatively, and the taste of a smoker can be proper. In addition, high-concentration propylene glycol and glycerin components are removed from the components of the tobacco liquid, and the taste of the smoker can be more comfortable.