The　amorphous/nanocrystalline　Ni-Mo　and　Ni-Mo-La　alloy　co-depositions　were　obtained　in　alkaline　solution.　The　effects　of　La　on　the　composition　microstructure,　morphology　and　chemical　activation　of　the　deposition　were　investigated　by　X-ray　diffraction　(XRD),　scanning　electronic　morphology　(SEM)　and　electrochemical　workstation.　It　was　found　that　the　Mo　content　in　the　deposition　increased　with　the　increasing　La　correspondingly.　The　α-NiMo,　β-Ni4Mo,　γ-Ni3Mo　and　δ-Ni8Mo　compounds　were　formed　in　the　Ni-Mo　alloy.　And　the　particles　of　coating　surface　became　smaller　and　dispersed　more　uniformly,　which　resulted　in　a　smooth　and　compact　coating　surface.　The　microhard-ness　of　the　coating　firstly　increased　and　then　decreased　with　increasing　La　content　in　the　deposition.　The　NiMo-La　alloy　exhibited　a　good　catalytic　property.　This　could　be　related　to　the　high　chemical　activity　of　the　La-contained　compounds,　which　provided　catalyst　active　center　for　the　electrolysis　process　and　consequently　decreased　the　potential　voltage　of　the　hydrogen　evolution.