People　often　use　superplasticizer　and　mineral　admixtures　(such　as　steel　slag,　slag,　etc.)　to　increase　the　density　of　concrete　and　improve　concrete　strength,　but　don＇t　use　coarse　aggregate　gradding.　The　paper　selects　the　coarse　aggregate　of　skeleton　structure　from　several　grading　concept,　and　uses　Uniform　Design　to　test　high　strength　concrete　workability,　and　analyses　results.　It　is　shown　from　the　results　that　the　method　of　Uniform　Design　can　significantly　reduce　the　workload,　and　concrete　mixture　slump　increases　linearly　with　the　water-cement　ratio　and　sand　percentage,　but　decreases　linearly　with　steel　slag　addition,　and　the　water　released　from　the　flocculation　of　cement　by　superplasticizer　can　increase　the　slump,　and　most　of　water　plays　the　role　of　lubricant　before　it　reacts　with　cement,　and　the　effect　of　slump　that　sand　extends　coarse　aggregate　skeleton　are　greater　than　that　sand　surface　area　increases.　©　(2011)　Trans　Tech　Publications,　Switzerland.