The invention discloses an AP selection indoor positioning method of a path loss model, which comprises the following steps: (1) offline data collection; (2) establishment of an initial fingerprint database; (3) division of sub-areas of the fingerprint database; (4) effective selection of the AP. Although the AP selection method based on the path loss model can effectively select the APs that havesimilar contributions to positioning, the stability of the AP is not considered, and the Fisher criterion can achieve effective selection of the stable AP. Therefore, the AP selection indoor positioning method of the path loss model in the present invention introduces the Fisher criterion into the AP selection method based on the path loss model, thereby making up for the problem of insufficientconsideration for selection of the stable AP, so that the constructed wireless map is more reliable, thereby improving the positioning accuracy.