In　this　article,　Ni-coated　W　powders　were　firstly　prepared　by　a　liquid-solid　doping　method　combined　with　air　calcination　and　hydrogen　reduction.　X-ray　diffraction　analysis,　scanning　electron　microscope,　transmission　electron　microscope,　X-ray　photoelectron　spectroscopy　and　temperature　programmed　reduction　analysis　were　carried　out　to　investigate　the　nickel　doping　process　in　WO3　and　its　influence　on　the　reduction　behaviors　of　tungsten　oxides.　It　reveals　that　after　calcinations　most　Ni　ions　would　occupy　the　lattice　sites　of　host　W　ions　and　decrease　the　interplanar　spacing　of　WO3.　The　latter　is　due　to　the　promotion　of　oxygen　vacancy　generation　within　WO3　rather　than　the　changes　in　ionic　radius.　After　hydrogen　reduction,　the　doped　Ni　atoms　precipitate　onto　the　surface　of　W　particles　as　thin　metallic　coatings,　whereby　the　size　and　morphology　of　reduced　W　particles　are　varied　greatly　with　increasing　Ni　addition.　The　presence　of　Ni　has　also　been　found　to　lower　the　reduction　barriers　for　WO3　by　using　first-principles　calculation.　Finally,　W-Ni　compacts　were　sintered　at　1500　degrees　C　in　hydrogen　atmosphere　and　the　accelerated　densification　phenomenon　of　W　alloy　upon　Ni　doping　is　discussed.