The measurement of traditional magnetic field and Ampere force are carried out on

completely inde- pendent experimental instruments. In this paper，Arduino MCU and Hall sensor

are applied to university physics experimental instruments，and a kind of comprehensive

instrument is designed and manufactured to measure the distribution of magnetic field and

the Ampere force caused by the current carrying circular coil，Helmholtz coil and Hall sensor. The

magnetic induction intensity and Ampere force can be read through the display screen

directly， conveniently and fast. The experimental teaching principles and contents of studying the

influence factors of magnet- ic field distribution and Ampere force are expanded，which is helpful

for students to deepen their understanding of the application and practice of physical

knowledge，cultivate students’innovative thinking and stimulate their inter- est in learn.