Abstract: In order to improve the accuracy of indoor positioning, the method of indoor fusion positioning based on PDR and geomagnetic was proposed on the basic analysis of their respective characteristics. In actual position, to exclude the non-matching area quickly and reduce the matching area, the system take the two step length of the PDR positioning for the geomagnetic search area in the advantage of PDR's short-term highly precision, and then the geomagnetic matching algorithm was used to find out the best matching point. The experimental results show that the geomagnetic matching algorithm can real-time dynamic compensate PDR's positioning error, and the system can obtain a higher positioning precision.