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The Ni-base single crystal superalloy was bonded by the transient liquid phase (TLP) bonding, using a Nbbase flexiblemetal cloth as an insert alloy. TLP bonding of superalloy was carried out at 1473～1523 K for 0.5～24 h in vacuum.The [001] orientation of each test specimen was aligned perpendicular to the joint interface. The bonded region wasobserved by optical microscopy, and the microstructural and compositional analyses across the bonded interlayer wereperformed by using a scanning electron microscopy (SEM). The electron back scattering diffraction (EBSD) methodwas applied to determine the crystallographic orientation. The results indicated that the chemical homogeneity acrossalmost identical, while the bonded interlayer had almost matched the crystallographic orientation of the bondedsubstrates.