Abstract: Steel bars are key parts in cement pole, and their health status shall have effect on the safety of cement pole in use. The principle of electromagnetic testing was analyzed, and the testing sample and experiment system were designed according to the research purpose. The sample is composed of end cover, PVC pipe and steel bars, and the experiment system was designed by three parts, the sensor unit, the signal processing and the computer system which are used to measure the electromagnetic characteristics of circumferential distributions of cement pole. At last, the experimental scheme is designed to collect the electromagnetic characteristics and study in their effect on the steel bars circumferential positioning. The data showed that it had little effect on steel bars positioning under appropriate accuracy and it was a useful method for the quality evaluation of cement pole.