Nanoscale　WC-Co　composite　powders　were　synthesized　by　in　situ　reduction　and　carbonization　reactions　at　different　temperatures.　The　powders　were　subsequently　consolidated　in　the　spark　plasma　sintering　(SPS)　system,　and　then　the　nanocrystalline　WC-Co　cemented　carbide　bulk　materials　were　obtained.　Systematic　tests　and　analyses　show　that　the　cemented　carbides　consolidated　from　the　powders　synthesized　at　low　temperature　has　obvious　orientation　distribution　of　WC　characteristic　planes.　The　area　fraction　of　the　(0001)　plane　vertical　to　the　sintering　pressure　direction　occupies　up　to　40%,　but　that　parallel　to　the　sintering　pressure　direction　is　only　10.72%.　In　contrast,　the　cemented　carbide　bulk　materials　consolidated　from　the　powders　synthesized　at　higher　temperatures　do　not　exhibit　the　orientational　distribution　of　characteristic　planes.