On account of the complexity of the interaction between anchor and soil, the current researches on the horizontal bearing capacity of inclined spiral piles are still unable to meet the relevant engineering requirements. Based on the horizontal bearing test of spiral vertical single pile, the bearing performance of tilted single pile under horizontal load was studied by nonlinear finite element software ABAQUS, and the influence of different inclined angles on the bearing performance was analyzed in detail. The main research results are as follows:(1) When the tilt angle does not exceed 45°, the screw pile is controlled by the horizontal limit displacement under the action of horizontal load. (2) With the increase of the tilt angle, the horizontal bearing capacity of the spiral pile gradually increases. For the helical pile with the same dip angle, the horizontal bearing capacity of positive dip is always greater than that of negative dip, and the ratio of the load shared by the blades to the horizontal ultimate bearing capacity keeps increasing (for the helical pile with positive dip angle, the ratio increases from 2.4% to 15.6%). (3) In the whole process of loading, the plastic deformation area of soil mass is mainly concentrated in a small range on the side of the top pile, and the soil mass at the blade has no plastic deformation.