The invention discloses a single person positioning navigator based on multi-sensor fusion and a positioning and navigating method. The single person positioning navigator comprises a global satellite positioning system, a barometer, a three-axis gyroscope, a three-axis accelerometer and three-axis geomagnetic sensors. Attitude angle information obtained through the gyroscope, position information obtained through the accelerometer, human body course information provided by the geomagnetic sensors, height information provided by the barometer, stride frequency information worked out by the accelerometer, and position and speed information provided by the global satellite positioning system are input into a kalman filter together, multi-information fusion is carried out through a kalman filter algorithm, and thus positioning and navigating parameters are output. Even when the global satellite positioning system cannot stably receive information due to shielding, electromagnetic interference and other factors, the single person positioning navigator based on multi-sensor fusion and the positioning and navigating method can achieve effective positioning and navigating and are suitable for various environments such as inside rooms or inside tunnels. By means of the single person positioning navigator based on multi-sensor fusion and the positioning and navigating method, positioning errors accumulated along with time can be reduced, and accurate individual 3D positioning can be achieved.