In order to study the bearing characteristics of single loaded rock-socketed pile under horizontal load, In view of the difficulty and complexity of dynamic test, adopt pseudo-static test, rock and pile are simulated with similar material, considering the vertical and horizontal load, designed and completed three groups of model test. The elastic bending moment, rock pressure around the pile and the hysteresis curve of the pile top are analyzed under different slope and elastic modulus of rock. The results show that the horizontal bearing capacity of pile foundation of rock slope is mainly related to shallow slope within the range of buried depth above 3D (D is pile diameter) . The failure pattern of the downslope rock mass is similar to that of the soil slope, which goes through three stages: the emergence of cracks, the development of failure surface and the failure of the shallow slope body, but the upslope rock mass has not formed a complete failure surface. Finally, the shear failure of pile foundation leads to the failure of horizontal bearing capacity, indicate that when the slope is rock, the horizontal bearing capacity of pile foundation is mainly. The slope mainly affects the positive bearing capacity. When the slope changes from 15° to 30°, the positive bearing capacity increases by 41.3%, while the negative bearing capacity only increases by 0.15%. The slope strength has an impact on both positive and negative bearing capacity. The pile-rock elastic modulus ratio changes from 2.8 to 0.9, the positive bearing capacity increases by 80.7% and the negative bearing capacity increases by 73.5%.