Nylon　6/nylon　66/thermotropic　liquid　crystalline　polyamide　(PA　6/PA　66/TLCPa)　blends　were　prepared　by　solution　blending　process.　Miscibility　and　crystallization　behavior　of　the　blends　were　investigated　by　differential　scanning　calorimetry　(DSC),　Fourier　transform　infrared　spectroscopy　and　wide　angle　diffractometry　(WAXD).　The　analyses　by　DSC　reveal　that　the　introduction　of　TLCPa　improves　the　miscibility　between　nylon　6　and　nylon　66　and　furthermore,　suppresses　the　crystallization　of　PA　6/PA　66　blend.　The　Fourier　transform　infrared　spectroscopy　spectra　prove　that　a　great　amount　of　intermolecular　hydrogen　bonding　form　between　TLCPa　and　PA　6　or　PA　66　molecules,　that　is　recognized　as　the　main　function　of　TLCPa　played　in　improving　miscibility　of　the　blends.　The　addition　of　TLCPa　does　not　bring　about　any　impact　on　the　crystallographic　form　or　crystal　structure　of　the　blends,　but　the　crystallinity　significantly　lowers　when　the　mass　fraction　of　TLCPa　exceeds　10%,　as　confirmed　by　the　WAXD　analyses.