The invention discloses an embedding structure of the rear border and a kickplate of an escalator step. The embedding structure comprises the kickplate and the rear border which has the lower end embedded with the upper end of the kickplate; the surface of the kickplate is evenly provided with a plurality of kickplate convex teeth in parallel; the rear side of the rear border is provided with rear convex teeth corresponding to the kickplate convex teeth; the outer side surface of kickplate convex teeth is provided with a kickplate groove; the lower part of the rear convex tooth is provided with a rear border groove; the lower end of the rear border groove has the same shape as the kickplate groove and is butted with the kickplate groove; and the rear border groove is gradually transited to the surface on the upper part of the rear convex teeth upward from the lower end of the groove. The embedding structure has the advantages that the embedding structure can improve a gap between adjacent steps during the operation of an escalator, particularly the operation from an inclined section to an horizontal section, prevent clothes and objects from being clamped, improve the safety of theoperation of the escalator, and effectively strengthen the rigidity of the kickplate at the same time.