An ultrasonic electronic cigarette atomization core and an ultrasonic electronic cigarette atomizer, the ultrasonic electronic cigarette atomization core comprises an atomization core sleeve, an atomization piece (1) is provided in the atomization core sleeve, an air passage, an air pass pipe (2) and a cup-shaped tobacco tar guide cotton (3) are further provided in the atomization core sleeve, an outer bottom surface of the tobacco tar guide cotton (3) is in contact with a top surface of the atomization piece (1), and a side wall of the tobacco tar guide cotton (3) is sheathed at the outside of the bottom of the side wall of the air pass pipe (2)； and the airflow enters from the air passage, flows by an inner bottom surface of the tobacco tar guide cotton (3) after penetrating through the bottom of the side wall of the tobacco tar guide cotton (3), and outflows from the air pass pipe (2)； or the airflow enters from a top end of the air pass pipe (2), penetrates through the bottom of the side wall of the tobacco tar guide cotton (3) after flowing by the tobacco tar guide cotton (3), and outflows from the air passage.
