Positioning technology based on geomagnetic signal has the advantages of no need to set up signal transmitting equipment, low cost and wide coverage of indoor positioning. Aiming at the present situation that indoor geomagnetic positioning method is complicated and requires repeated measurement to accurately map two-dimensional plane coordinate points, a method based on mobile terminal image visualization mapping and automatic insertion of acquisition data was proposed to quickly collect indoor geomagnetic fingerprints and dynamically establish fingerprint database matching indoor two-dimensional maps. Based on this acquisition method, the improved dynamic time warping (DTW) algorithm is used for geomagnetic sequence matching in the positioning phase, which can reduce the amount of calculation and improve the accuracy of positioning results. Subsequently, particle filter is used to fuse the positioning results based on geomagnetic sequence matching and pedestrian dead reckoning (PDR) results to achieve fast and accurate positioning on the intelligent mobile terminal carrier. Simulation and experimental results show that the proposed method has a pedestrian tracking and positioning efficiency of 65 ms per step and an average positioning accuracy of 1. 4 m in large indoor areas.