In the code for design of foundation and foundation of bridges and culverts, the bearing capacity of traditional gravity anchorage foundation is calculated only by considering the friction effect of foundation base, but not the effect of rock socketed effect of bottom plate on the improvement of bearing capacity. In order to study the influence of rock socketed effect on the bearing capacity of gravity anchorage, two groups of indoor scale model tests of non rock socketed and rock socketed gravity anchorage with a scale of 1:50 were designed and carried out to study the bearing characteristics and load distribution law of different models under vertical and horizontal combined loads, so as to obtain the effectiveness of rock socketed effect. The test results show that: under the same horizontal cable force, the displacement of gravity anchorage Considering Rock Socketed effect is smaller, and the horizontal ultimate failure load can be increased by about 17.7%. Moreover, after the bottom plate is embedded in the moderately weathered layer, the rock layer provides the side friction resistance for the anchorage structure, so as to reduce the stress level of the bottom plate, and change the ultimate failure state of the gravity anchor from “sliding friction failure mode” to “overturning failure mode”, which provides technical support for the design and construction of the gravity anchor foundation.