As a lightweight support structure, anchor plate retaining structure is suitable for filling slope support. In view of an improvement of the uplift bearing capacity of the anchor plate anchoring system, a series anchor plate anchoring system has thus been proposed. Based on FLAC3D finite difference software, a finite difference model is established for the interaction between a series of vertical rectangular double anchor plates and soil, followed by an inquiry into the effects of spacing between front and rear anchor plates, anchor plate burial depth, soil cohesion, as well as internal friction angle on the pullout performance of the anchoring system. The research results indicate that in order to avoid the interaction between the front and rear anchor plates, thus reducing the load-bearing capacity of the anchoring system, the spacing between the front and rear anchor plates should be no less than 3 times the length of the anchor plate side. With the buried depth of the anchor plate less than 5 times the length of the anchor plate side, there will be an asymmetric failure mode of the anchor system, exhibiting the failure characteristics of deep embedment anchor plate. With the buried depth of the anchor plate greater than 5 times the length of the anchor plate side, there will be a symmetric failure mode of the anchoring system, exhibiting the failure characteristics of the deep buried anchor plate. Thus, an improvement of the internal friction angle of the soil around the anchor plate is an effective way to improve the pulling capacity of the anchoring system.