Abstract: The effects of 0.5T magnetic field on the friction and wear behavior of electromagnetic pure iron under dry friction were investigated.Using electromagnetic pure iron as the base material, a 0.5 T magnetic field was added through the coil, and the load of the friction tester was changed at the same time, and the dry friction test was carried out under the load of 10 N, 20 N, 30 N and 40 N, respectively.The change of the friction coefficient map was analyzed, and the wear morphology of the friction surface was characterized by scanning electron microscope (SEM).The results show that under a load of 10N, after adding a 0.5 T magnetic field, the friction coefficient increases from 0.4 to 0.8, and the time curve of the friction coefficient fluctuates greatly, and the friction and wear behavior changes drastically.The wear mass difference increases from 1.5 mg to 4.2 mg; while under 40N load, the effect of the magnetic field is less.The friction coefficient increases from 0.5 to 0.6, and the wear quality difference increases from 15.3 mg to 22.9 mg. At low load, the addition of magnetic field greatly affect the dry friction behavior of pure iron, and the friction and wear seriously aggravate; while the magnetic field under high load has little effect on the friction behavior. In the work production operation, the wear behavior of the low load in the magnetic field environment should be prevented.