Series　of　WMo　solid　solution　nanopowders　with　a　wide　composition　range　were　successfully　synthesized　by　the　sol-gel　method　combined　with　the　hydrogen　reduction.　The　phase　constitution,　powder　morphology　and　electronic　transfer　or　interaction　of　the　synthesized　WMo　solid　solution　alloys　were　characterized　by　SEM,　XRD,　TEM,　EDS,　XPS　and　first-principle　CASTEP　calculation.　The　experimental　results　confirmed　that　Wand　Mo　were　evenly　distributed　in　the　solid　solution　nanopowders.　Also,　with　the　increasing　Mo　content,　both　experimental　and　theoretical　results　verified　that　the　formation　of　solid　solution　led　to　a　decrease　of　lattice　parameter　and　an　electronic　transfer　from　Mo　to　W.　(C)　2020　Elsevier　B.V.　All　rights　reserved.