Bonding with existing concrete is one of the important application situations of self-compacting concrete. With the aim of investigating the bonding characteristics between desert sand self-compacting concrete (DSSC) and other existing concrete, the bond-casting test, bonding interface splitting tensile strength and sand-filling method was used to determinate the failure mode and analyze the influence of concrete type and interface treatment method on the bonding characteristics between old and new concrete. Scanning electron microscope was used to photograph the micro-morphological characteristics of the bonding interface and determinate the distribution of gap width. The result showed that the bonding performance was stronger when the linear grooving was consistent with the load direction. Compared with linear groove cutting, the drilling interface was more efficient in interface efficiency and bonding strength. Low water-to-cement ratio reduced the gap at the bond interface. The effect of desert sand on the reduction of the gap at the bond interface was more significant with low water-to-cement ratio.