In order to clarify the mechanical properties of the double-row anti-slide piles with top rigid connections, we established two models with and without a beam on the pile top respectively to compare the stress and deformation characteristics under the same condition, and discussed the loading mechanism of the spatial structure composed of piles and beams, which was verified from the angle of structural mechanics. The study shows that the pile’s maximum shear and moment both exist at the sliding surface; The maximum shear and moment of piles with a beam is smaller than those without beams. The anti-bending moments on the piles’tops are equal. The piles with a beam can reduce top’s displacement, shear and moment of pile commitment by providing anti-bending moment, increase the inertia of the anti-slide structures, and improve the anti-sliding force.