Abstract: An experimental method is employed to study the dynamic characteristics of the Hall element in alternating current and the alternating magnetic field. The experiment is based on Hall effect，changed an argument and passed through an alternating signal with keeping other conditions unchanged，observed experimental results， obtained amplitude frequency and phase frequency characteristics of the Hall voltage. From the results of the experiment，we find that there is a large difference between the dynamic and static characteristics of the Hall element.

Key words: Hall element, alternating current, alternating magnetic field, Hall voltage, phase