The　rational　design　and　fabrication　of　nanostructures　has　become　a　fashionable　strategy　for　pursing　high　thermoelectric　performance　in　solid-state　materials.　Here　we　report　nanostructured　Te-Sb2Te3　composites　with　significantly　enhanced　thermoelectric　performance　through　a　scalable　bottom-up　method　followed　by　a　rapid　sintering　process.　The　power　factor　along　with　the　carrier　concentration　could　be　significantly　enhanced　by　increasing　the　number　of　point　defects　of　Sb＇(Te).　Meanwhile,　a　great　number　of　boundaries　and　hetero-interfaces　between　the　Te　and　Sb2Te3　nanoparticles　could　play　an　important　role　in　blocking　phonons,　resulting　in　the　evident　suppression　of　lattice　thermal　conductivity.　Ultimately,　a　highest　zT　value　close　to　1.0　could　be　achieved　at　623　K　in　samples　with　components　of　2.6　mol%　Sb2Te3　and　97.4　mol%　Te.　Such　a　peak　zT　value　is　comparable　to　that　of　doped　Te　materials　synthesized　by　the　conventional　solid-state　reaction　process.　This　work　reveals　that　high　thermoelectric　performance　could　be　realized　in　an　intentionally　designed　nanocomposite　by　synergistically　improving　the　power　factor　and　suppressing　the　lattice　thermal　conductivity.