A method for manufacturing an Al/AlN or Al alloy/AlN composite powder having excellent interfacial properties through direct nitridation during mechanical alloying, and a method for manufacturing a high strength ultra-fine/nano-structured Al/AlN or Al alloy/AlN composite material through hot consolidation of powder are provided. A method for manufacturing a high strength ultra-fine/nano-structured Al/AlN or Al alloy/AlN composite material comprises: preparing an AlN precursor by mechanical milling/alloying an Al powder or a mixed powder of the Al powder and alloy elements in an atmosphere of nitrogen gas(N2), ammonia gas(NH3) or a mixture thereof containing nitrogen for inducing nitridation; passing the AlN precursor through a subsequent heat treatment process to prepare an Al/AlN or Al alloy/AlN composite powder; and passing the Al/AlN or Al alloy/AlN composite powder through a hot consolidation process to manufacture the high strength ultra-fine/nano-structured Al/AlN or Al alloy/AlN composite material.
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