Abstract: According to the electromagnetics theory and the measurement model of speclfic absorption rate（SAR） , we simplify the method of measurement for mobile phone electromagnetic radiation. The level of mobile phone electromagnetic radiation is measured by magnetic flux density of near-field thermal radiation of mobile phone. With experimental measurements and numerical analysis of magnetic flux densityin the different mobile phone use state, we summarize the general rules of mobile phone electromagnetic radiation. It is found that mobile phone electromagnetic radiation when phone is switched is few times to normal call, brand mobile phone radiation is relatively weak, and the mobile phone on moving has more electromagnetic radiation than phone at a standstill. Put forward countermeasures and suggestions to reduce the influence of mobile phone electromagnetic radiation on the human.

Key words: mobile phone electromagnetic radiation, specific absorption rate （SAR）, magnetic flux density