The　effects　of　ball　milling　processes　on　specific　surface　area,　particle　size　distribution,　and　compressive　strength　at　different　curing　ages　of　one-part　alkali-activated　nickel　slag　mortar　(AASBM)　were　investigated.　Results　show　that　the　influence　of　impact　efficiency　on　nickel　slag　from　mechanical　and　chemical　interaction　differs　with　ball　milling　process.　Reducing　ball　loading　rate　and　increasing　ball　material　ratio　has　the　highest　energy　efficiency　for　improving　specific　surface　area　and　improving　the　strength　of　28　d　of　AASBM,　respectively.　With　the　extension　of　ball　milling　time,　the　specific　surface　area　of　cement　can　be　improved　but　the　strength　increase　amplitude　of　the　mortar　will　decrease　accordingly.　When　the　ball　loading　rate　is　30%,　the　ball　material　ratio　is　15,　and　the　undisturbed　nickel　slag　is　milled　with　high　speed　for　2　h　then　mixed　with　solid　alkali,　the　compressive　strength　of　AASBM　is　optimal.